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if cosec theta=3x and cot theta=3/x, then find the value of (x²-1/x²)

Posted by Priyanka Vaghera 5 years ago

CBSE > Class 10 > Mathematics

1 answers

Ayush Kumar 5 years ago

Cot^2 theta + 1 = cosec^2 theta (3/x)^2 + 1 = (3x)^2 9/x^2 + 1= 9x^2 9/x^2 - 9x^2 = -1 9(1/x^2 - x^2) = -1 3(1/x^2 - x^2) = -1/3 Therefore, 3(x^2 - 1/x^2) = 1/3

ANSWER

2 cos ^2 30 -1

Posted by Apeksha Apeksha 5 years ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Dear students u always hear about ( in fun) how 2+2=5? Today I will prove it by breaking the law of mathematics.....??.....

Posted by Itachi Uchiha ? 5 years ago

CBSE > Class 10 > Mathematics

5 answers

Itachi Uchiha ? 5 years ago

Thnku (^£^) ......

: (ᵔᴥᵔ) ???? (ᵔᴥᵔ) 5 years ago

Ohhh gr8?

Nasir Ul Haq 5 years ago

.................

Itachi Uchiha ? 5 years ago

But no I will prove it at 2:30 pm get ready..........

Itachi Uchiha ? 5 years ago

Someone said it is done by mistake ???.....

ANSWER

3/5 x^2 - 2/3x +1 = 0

Posted by Sahil Jonnalagadda 5 years ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

(x6 y-3 / x-2 y3 ) 1/2 ÷ ( x-1 y2 / x3 y-2 ) 1/3 = x se y v then find the value of a + b

Posted by Bobby Dubey 5 years ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Chapter 8 ex 8.4 questions no 1 2

Posted by Raj Vardhan Singh 5 years ago

CBSE > Class 10 > Mathematics

1 answers

Kavita Yadav 5 years ago

To convert the given trigonometric ratios in terms of cot functions, use trigonometric formulas We know that, cosec2A – cot2A = 1 cosec2A = 1 + cot2A Since cosec function is the inverse of sin function, it is written as 1/sin2A = 1 + cot2A Now, rearrange the terms, it becomes sin2A = 1/(1+cot2A) Now, take square roots on both sides, we get sin A = ±1/(√(1+cot2A) The above equation defines the sin function in terms of cot function Now, to express sec function in terms of cot function, use this formula sin2A = 1/ (1+cot2A) Now, represent the sin function as cos function 1 – cos2A = 1/ (1+cot2A) Rearrange the terms, cos2A = 1 – 1/(1+cot2A) ⇒cos2A = (1-1+cot2A)/(1+cot2A) Since sec function is the inverse of cos function, ⇒ 1/sec2A = cot2A/(1+cot2A) Take the reciprocal and square roots on both sides, we get ⇒ sec A = ±√ (1+cot2A)/cotA Now, to express tan function in terms of cot function tan A = sin A/cos A and cot A = cos A/sin A Since cot function is the inverse of tan function, it is rewritten as tan A = 1/cot A

ANSWER

(ii) 11th term of the AP: -3,-1/2 ,2,...,is?

Posted by Uttam Singh Gurjar 5 years ago

CBSE > Class 10 > Mathematics

1 answers

Ayushi Rai 5 years ago

17

ANSWER

di is that deviation of xi from assumed mean a.

Posted by G.Mohammed Fayaz✨ Fz Fayaz 5 years ago

CBSE > Class 10 > Mathematics

1 answers

G.Mohammed Fayaz✨ Fz Fayaz 4 years, 8 months ago

Yes

ANSWER

The triangle which rajeev removed in the first round are in order ,numbered 1,3 ,5,7,9 if rajeev continues is the same rainier, which number triangle will be left in the last

Posted by Manisha Isha 5 years ago

CBSE > Class 10 > Mathematics

2 answers

Om Prakash Tiwari 4 years, 4 months ago

1

Sanjay Kumar 4 years, 8 months ago

2 and 1

ANSWER

Cbse 10th standard chapter 11 exercise 11. 2 question no. 1and2

Posted by Treesa Joseph 5 years ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Which of the following is a polynomial ? (i)X^2+2X^1/3+4 (ii)X+1/X (iii)X^-1+X^2 (iv)ax^2+bx+c

Posted by Gowtham Kotam 5 years ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Formula for sum and product of roots in a quadratic polynomial

Posted by Gowtham Kotam 5 years ago

CBSE > Class 10 > Mathematics

1 answers

Subhalaxmi P 5 years ago

Middle term factorization

ANSWER

Find the zerors of the given polynomial X^2+3X+2

Posted by Gowtham Kotam 5 years ago

CBSE > Class 10 > Mathematics

2 answers

Vidya Mudaraddi 5 years ago

2x²+3x+2=0 2x²+4x-1x+2=0 2x(x+2)-1(x+2)=0 (X+2) (2x-1)=0 X=-2 & x=1/2

Subhalaxmi P 5 years ago

X^2+x+2x+2 x(x+1)+2(x+1) (x+1)(x+2) x = -1,-2

ANSWER

9^x - 2^(x+1/2) = 2^(x+3/2) - 3^(2x-1)

Posted by Namrata Jindal 5 years ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

If cos A=4/5,then find values of tanA and cotA

Posted by Vivek Gk 5 years ago

CBSE > Class 10 > Mathematics

3 answers

Dhawanpreet Kaur 5 years ago

Cos A =4/5 so, b/h=4/5 , b =4, h=5 and then tan A =3/4 ,cot A =4/3

A . 5 years ago

TanA=3/4 and cotA=4/3

Yogita Ingle 5 years ago

cos A = 4/5

sin A =√1 - cos² A = √1 - (4/5)² = √1 - 16/25 =√(25-16)/25 = √9/25 = 3/5

tan A = sinA/cos A = 3/4

ans cot A = cos A /sinA = 4/3

ANSWER

The value of sin theta

Posted by Vivek Gk 5 years ago

CBSE > Class 10 > Mathematics

4 answers

Dhawanpreet Kaur 5 years ago

P upon H U should learn the table P B P H H B And now see carefully Up to down each line first is P upon H is SIN Q where q is theta B upon H is cos Q and P upon B is tan q

Vaishnavi Gupta 5 years ago

P/h

Varista Gupta 5 years ago

Perpendicular/hypothesis

Vaishnavi Singh 5 years ago

p/h

ANSWER

Rs Aggarwal solution class 10 CBSE

Posted by Allu Arjun 5 years ago

CBSE > Class 10 > Mathematics

2 answers

Vaishnavi Gupta 5 years ago

Chapter?????

Prince Yadav 5 years ago

Chapter ???????

ANSWER

Maths solutions class 10 CBSE RS Aggarwal

Posted by Allu Arjun 5 years ago

CBSE > Class 10 > Mathematics

2 answers

Vaishnavi Gupta 5 years ago

Ji chapter btane ka kasht kree

Prince Yadav 5 years ago

Chapter ?????

ANSWER

hello , may I know all the deleted portion of mathematics. it differs from website to website. I want to know the exact portions that are deleted.

Posted by Aa A 5 years ago

CBSE > Class 10 > Mathematics

2 answers

Sakshi Jagtap 5 years ago

ohh nice Atul....from where uhh have taken this?

Atul Kumar 5 years ago

CHAPTER TOPICS REMOVED ?UNIT I-NUMBER SYSTEMS 〰️ ?REAL NUMBERS ➡️? Euclid’s division lemma ?UNIT II-ALGEBRA 〰️ ?POLYNOMIALS ➡️?Statement and simple problems on division algorithm for polynomials with real coefficients. ?PAIR OF LINEAR EQUATIONS IN TWO VARIABLES ➡️ ?cross multiplication method ?QUADRATIC EQUATIONS ➡️ ?Situational problems based on equations reducible to quadratic equations ?ARITHMETIC PROGRESSIONS ➡️ ?Application in solving daily life problems based on sum to n terms ?UNIT III-COORDINATE GEOMETRY 〰️ ?COORDINATE GEOMETRY ➡️ ? Area of a triangle. ?UNIT IV-GEOMETRY 〰️ ?TRIANGLES➡️Proof of the following theorems are deleted ?The ratio of the areas of two similar triangles is equal to the ratio of the squares of their corresponding sides. ?In a triangle, if the square on one side is equal to sum of the squares on the other two sides, the angle opposite to the first side is a right angle. ?CIRCLES ➡️No deletion ?CONSTRUCTIONS ➡️Construction of a triangle similar to a given triangle. ?UNIT V- TRIGONOMETRY 〰️ ?INTRODUCTION TO TRIGONOMETRY ➡️ ?motivate the ratios whichever are defined at 0o and 90o TRIGONOMETRIC IDENTITIES➡️ ?Trigonometric ratios of complementary angles. ?HEIGHTS AND DISTANCES➡️No deletion ?UNIT VI-MENSURATION 〰️ ?AREAS RELATED TO CIRCLES ➡️ Problems on central angle of 120° ?SURFACE AREAS AND VOLUMES ➡️ Frustum of a cone. ?UNIT VI-STATISTICS & PROBABILITY 〰️ ?STATISTICS ➡️?Step deviation Method for finding the mean ?Cumulative Frequency graph ?PROBABILITY➡️ No deletion

ANSWER

prove that 7-2√3 is an irrational number

Posted by Nandini Kolli 5 years ago

CBSE > Class 10 > Mathematics

2 answers

Aman Singh 4 years, 5 months ago

Thanks

Anjali Bisht 5 years ago

Question:- (7-2√3) Solution:- Let us assume that (7-2√3) is a rational number. Therefore we can write in the form of p/q. Where p and q are co- prime numbers. 7-2√3=p/q 7-p/q=2√3 7q-p/q=2√3 7q-p/2q=√3 √3=7q-p/2q Since, we know that √3 is an irrational number . Hence our assumption is wrong 7q-p/q or 7-2√3 is an irrational number.. Hence Proved..... I hope now your doubt is clear??

ANSWER

Prove that 7-2√3 is an irrational

Posted by K. Asritha 5 years ago

CBSE > Class 10 > Mathematics

1 answers

Varun Soni 5 years ago

https://images.app.goo.gl/eJK1UnZKtYo2NaEA6

ANSWER

A vertical pole of 6m high casts a shadow 4m long on the ground . At the same time a tower casts a shadow 28m long .Find the height of the tower.

Posted by ?Isha .B 5 years ago

CBSE > Class 10 > Mathematics

4 answers

Xyz Student 5 years ago

Solution: Given AB=6 cm, BC=4 m, QR=28 m. To find:PQ. In ∆ABC and ∆PQR. Angle B= Angle Q= 90°[ Vertical]. Angle ACB= Angle PRQ [same angle on both, from sum]. By AA Criterion ∆ABC ∆PQR Corresponding sides of similar triangles are in proportion AB/PQ = BC/QR = 6/PQ = 4/28. PQ = (28*6)/4 = 42 cm. Height of tower = 42m

?Isha .B 5 years ago

Please...Explain... The Method...

Atul Kumar 5 years ago

42meter

Akhya Sahay 5 years ago

42 m

ANSWER

All trigonometry ratio and formula

Posted by Divyansh Vashishtha 5 years ago

CBSE > Class 10 > Mathematics

2 answers

Varun Soni 5 years ago

Trigonometry formula Sin=Oppo/hypo Cos=adj/hypo Tan=Oppo/adj Cosec=hypo/Oppo Sec=Hypo/adj Cot=Adj/Oppo Sin=1/cosec Cos=1/sec Tan= sin/cos Cot= cos

Akhilesh Achant 5 years ago

Trigonometry formula Sin=Oppo/hypo Cos=adj/hypo Tan=Oppo/adj Cosec=hypo/Oppo Sec=Hypo/adj Cot=Adj/Oppo Sin=1/cosec Cos=1/sec Tan= sin/cos Cot= cos/sin

ANSWER

What is consecutive number??

Posted by Nidhi Kumari 5 years ago

CBSE > Class 10 > Mathematics

1 answers

Esha Kendhe 5 years ago

a consecutive number is the one which follows one another without gaps Example 1,2,3...

ANSWER

CSA of a cylinder

Posted by Raj Singh 5 years ago

CBSE > Class 10 > Mathematics

5 answers

Munmun Naresh 5 years ago

2πrh

Nisha???????? Bharti 5 years ago

2πrh

Raj Singh 5 years ago

2 π r h + 2 π r 2 2 \pi rh + 2 \pi r^{2} 2πrh+2πr2.

?Mansi ? 5 years ago

the CSA of a cylinder will be: 2*π*R*H

Yogita Ingle 5 years ago

Curved Surface Area- The curved surface area is defined as the area of only curved surface, leaving the circular top and base.

Formula for calculating the Curved Surface Area (C.S.A.)-

Consider a cylinder having a height ‘h’ and base radius ‘r’.

The curved surface area of a cylinder is given as-

C.S.A.= $2\pi r h$

ANSWER

Find the ratio in which the point P (x, 2) divides the line segment joining the points A (12, 5 ) and B ( 4, -3 )

Posted by Puneeth Srisailam 5 years ago

CBSE > Class 10 > Mathematics

5 answers

?Mansi ? 5 years ago

3:5

Mohit Gupta 5 years ago

And the value of X is 9.??

Mohit Gupta 5 years ago

Hey! That is not the answer by mistake I typed it so answer is 3:5

Mohit Gupta 5 years ago

Ratio is 7:2

Daksh Khandelwal 5 years ago

Chapter 7 exercise 7.2

ANSWER

Height and distance link

Posted by Aditya Kumar 5 years ago

CBSE > Class 10 > Mathematics

1 answers

Gaurav Seth 5 years ago

Height is the measurement of an object in the vertical direction and distance is the measurement of an object from a particular point in the horizontal direction. If we imagine a line connecting the point of observation to the topmost point of the object then the horizontal line, vertical line and the imaginary line will form a triangle.

Observe the figure. Consider the observer to be at point C. The height of the object is shown by line AB. The distance of the object from the observer is given by line BC. The object may or may not be perpendicular to the ground. Line AC represents the Line of Sight when the observer is observing the topmost point of the object. Angle α represents the angle of elevation and Angle β represents the angle of depression.

Using trigonometry, if we are provided with any of the two quantities that may be a side or an angle, we can calculate all the rest of the quantities. By the law of alternate angles, the angle of elevation and angle of depression are consequently equal in magnitude (α = β). Tan α is equal to the ratio of the height and distance.

You can be provided with any two of the following information:

The distance of the object from the observer
The height of the object
Angle at which the observer views the topmost point of the object (angle of elevation)
The angle at which the observer views the object when the observer is on top of a tower/building (angle of depression)

ANSWER

Calculate the mean for the following distribution

Posted by Supriya Bharti 5 years ago

CBSE > Class 10 > Mathematics

1 answers

Pulkit Kumawat 5 years ago

Question

ANSWER

Show that any positive odd integer is of the form 6q + 1, or 6q + 3, or 6q + 5, where q is some integer.

Posted by Prashant Singh 5 years ago

CBSE > Class 10 > Mathematics

3 answers

Yogita Ingle 5 years ago

Let a be the positive odd integer which when divided by 6 gives q as quotient and r as remainder.

according to Euclid’s division lemma
a=bq+r

a=6q+r

where , a=0,1,2,3,4,5
then,
a=6q
or
a=6q+1
or
a=6q+2
or
a=6q+3
or
a=6q+4
or
a=6q+5

but here,
a=6q+1 & a=6q+3 & a=6q+5 are odd.

Bhaduram Hembra 5 years ago

What is meant by the idea of satyagraha ?

Bhaduram Hembra 5 years ago

What is gegraphy

ANSWER

Someone is very upset at me but just not showing it... but I know maybe because dont want me to be depressed. What should I do ?

Posted by Anuj Kumar 5 years ago

CBSE > Class 10 > Mathematics

2 answers

Sakshi Jagtap 5 years ago

??hlo......If that person is upset? at u there will be a particular reason behind her/his upsetness, it might be bcuz of some mistake happened from uhh or something else. U both will be friends ?or besties ? or ❤️luv birds, so u both will be doing some fun or cute gossips or cute fighting's in past. So u should repeat that gossips with ur dash or tell that person about ur past fighting's..... absolutely then that person will laugh?. Actually i have a real experience about this thing, my boyfriend was a bit upset at me then i noticed for some days n then i refreshed the old fun n memories between us then he started to laughing n give me a hot hug. I wish ?that this works on uhh. All the best?......IF I WAS KNOWING THE REASON BEHIND HIS OR HER UPSETNESS, I MIGHT HAVE HELPED UHH MORE NICELY.

Shikha Gupta 5 years ago

Can you please explain from which study side u have asked this question

ANSWER

Page 217 of 1971

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