CBSE > Class 10 > Mathematics | CBSE Board | Homework Help

Given TanA=1/√3=P/B H^2=P^2+B^2 H^2=(1)^2+(√3)^2 H^2=1+3 H=√4 H=2 Then, SinA=P/H=BC/AC=1/2 SinC=P/H=AB/AC=√3/2 CosA=B/H=AB/AC=√3/2 CosC=B/H=BC/AC=1/2 Hence, (i)sinA cosC + cosA sinC =1/2 × 1/2 + √3/2 × √3/2 =1/4 + 3/4 =4/4 =1 answer Hence, (ii)cosA cosC – sinA sinC =√3/2 × 1/2 - 1/2 × √3/2 =√3/4-√3/4 =0 answer

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Gopi buys a fish from shop for his aquarium . the shopkeeper takes out of one fish at random from a tank containing 5 mail and 8 female fish what is the probability of that the fish he taken out is a male fish

Posted by Subhash Chand 2 years, 1 month ago

CBSE > Class 10 > Mathematics

3 answers

Surbhi Pandey 2 years, 1 month ago

5/13

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Bhartendu Kushawah 2 years, 1 month ago

5/13

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Omya Aryan 2 years, 1 month ago

5/13

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Why π=180 degree

Posted by Akhil .S 2 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Saurav Kumar 2 years, 1 month ago

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Definition polynomial

Posted by Surya Singh 2 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Chinki 🦋👈🏻 2 years, 1 month ago

In which power of variables is whole number..

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Let a and b be two positive integers such that a = p3q4 and b = p2q3, where p and q are prime numbers. If HCF(a, b) = pmqn and LCM(a, b) = prqs, then (m+n)(r+s)=

Posted by Vidit Bhutada 2 years, 1 month ago

CBSE > Class 10 > Mathematics

3 answers

Ashish Rana 2 years ago

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Prabhat Ranjan 2 years, 1 month ago

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Prabha . 2 years, 1 month ago

Ans 35

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In a class test, the sum of shefali's marks in Mathematics and English is 30. Had she got 2 marks more in Mathematics and 3 marks less in English, the product of their marks would have been 210. Find her marks in the two subjects.

Posted by Omya Aryan 2 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Diamond Girl 2 years, 1 month ago

You can take any two numbers as x = 17 and 18 So if marks in English 17 then marks in math is 13 If marks in english is 18 then marks in math is 14

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Jayesh Meena 2 years, 1 month ago

Shefali -x

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Sum of all possible values of ×if 431×55is divisible by 5

Posted by Gagandeep Kaur 2 years, 1 month ago

CBSE > Class 10 > Mathematics

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If the system of equations 3x+y=1 and 2(k-1)x+(k-1)y=2k+1 is inconsistent then k=?

Posted by Arshpreet Kaur 2 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Aditya Yadav 2 years, 1 month ago

Adgfxg

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Draw the graph of the equation x+3y=3 and 2x-3y=12 Determine the co-ordinates of the vertices of triangle formed by the these lines and the Y-axis. Shade the triangle and find its area.

Posted by Lipika Yadav 2 years, 1 month ago

CBSE > Class 10 > Mathematics

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Number of letters 1-4 /6 4-7/30 7-10 /40 10-13/16 13-16/4 16-9 /4 Find means by direct method assume mean and step deviation find mode & median also

Posted by Zoya Khan 2 years, 1 month ago

CBSE > Class 10 > Mathematics

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The angle of elevation of an aeroplane from a point on the ground is 45°. After flying for 15 seconds, the elevation change to 30°. If the aeroplane is flying at a height of 2500 m, find the speed of the aeroplane.

Posted by 𝕷𝖊𝖌𝖊𝖓𝖉 🏆 🍑 🎀 𝒜𝓁☯𝓃𝑒 𝑅𝒶𝓈𝒽𝒾 🎀 🍑 2 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Jayansh Srivastava 2 years, 1 month ago

439.2km/hr

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A circle has number of tangents

Posted by Kashi Talari Talari 2 years, 1 month ago

CBSE > Class 10 > Mathematics

3 answers

Chinki 🦋👈🏻 2 years, 1 month ago

A circle has infinite number of tangent.......and only one tangent in a point of a circle..

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Omya Aryan 2 years, 1 month ago

A circle has infinite number of tangents.

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Timple Yadav 2 years, 1 month ago

In the circle there are only one tangent in a point of a circle

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Which of the following metals is less reactive than hydrogen

Posted by Tahzeeb Fatima 2 years, 1 month ago

CBSE > Class 10 > Mathematics

5 answers

Nimesh Negi 2 years, 1 month ago

Platinum,gold,silver,Mercury,copper is less reactive than Hydrogen.

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Chinki 🦋👈🏻 2 years, 1 month ago

Platinum,gold,silver,Mercury,copper is less reactive than Hydrogen...

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Chinki 🦋👈🏻 2 years, 1 month ago

Platinum<Gold<Silver<Mercury<Copper<Hydrogen<Lead<Iron<Zinc<Aluminium<Magnesium<Calcium<Sodium<Potassium............So... Pt,Au,Ag,Hg,Cu is less reactive than Hydrogen..

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Rashi Choure 2 years, 1 month ago

Lead < Iron < Zinc < Aluminium < Magnesium < Calcium < Sodium < Potassium

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Timple Yadav 2 years, 1 month ago

In the reactivity seires hydrogen all metal in the upper

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prove underoot 5 is irrational

Posted by Prachi Chhikara 2 years, 1 month ago

CBSE > Class 10 > Mathematics

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4x²-4x+3

Posted by Khushi Vanshika Sharma 2 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Chinki 🦋👈🏻 2 years, 1 month ago

(4x²-4x+3) (4x²-6x+2x+3) [2x(2x-3)+1(2x-3)] [(2x+1)(2x-3)] [(X=-1/2)(X=3/2)]

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On Comparing the ratio A1/A2 B1/B2 & C1/C2 find out the whether the lines representing the following pairs of linear equation intersect at a point are parallel or consedent. Also find the solution by graphical X+2y=0 & 3x+4y=20 2x+3y-9=0 & 4x+6y-18=0 X+2y-4=0 & 2x+4y-12=0

Posted by Sirajuddin. Mujawar 2 years, 1 month ago

CBSE > Class 10 > Mathematics

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In figure

Posted by Swati . 2 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Vivek Prajapati 2 years, 1 month ago

In which

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2 tan30° __________ 1-tan2 30°

Posted by Anant Dhaka 2 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Abdul Hannan 2 years, 1 month ago

2tan30°>1-tan²30°

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Tanisk Sahu 2 years, 1 month ago

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If A.P. Sn =2n²+3n, find A.P also find its nth term.

Posted by Ananya Gangwar 2 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Vivek Prajapati 2 years, 1 month ago

Am are right?

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Vivek Prajapati 2 years, 1 month ago

nth term is 4n+1. And. Ap is 5,9,13,17

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Prove that aSin + bcos=+-√a2+b2- C2 If acos -bsin =c

Posted by Geeta Umar 2 years, 1 month ago

CBSE > Class 10 > Mathematics

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Find the area of quadrilateral ABCD whose vertices are A(1,1), B(7,-3), C(12,2) and D(7,21).

Posted by Reema Gupta 2 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Faisal Khan 2 years, 1 month ago

The coordinates of A,B,C & D are A(1,1),B(7,3),C(12,2),D(7,21). Area of quadrilateral ABCD = Area of triangle ABC + Area of triangle ACD Area of triangle = 2 1 ∣[x 1 (y 2 −y 3 )+x 2 (y 3 −y 1 )+x 3 (y 1 −y 2 )]∣ Area of triangle ABC = 2 1 ∣[1(3−2)+7(2−1)+12(1−3)]∣ = 2 1 ∣[1+7−24]∣ = 2 1 (16)=8 sq. units Area of triangle ACD = 2 1 ∣[1(2−21)+12(21−1)+7(1−2)]∣ = 2 1 ∣[−19+240−7]∣ = 2 1 (214)=107 sq. units Hence, area of quadrilateral ABCD = 107+8=115 sq. units

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Bhavishay Chahar 2 years, 1 month ago

Rtfho

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Prove that a tangent drawn from the midpoint of an Arc of a circle is parallel to the chord joining the end points of the arc.

Posted by Kirtimaan Kumar 2 years, 1 month ago

CBSE > Class 10 > Mathematics

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sin tan

Posted by Siya Sharma 2 years, 1 month ago

CBSE > Class 10 > Mathematics

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2x^2+x-6=0 in complete square method

Posted by Sania Kumari 2 years, 1 month ago

CBSE > Class 10 > Mathematics

4 answers

Vivek Prajapati 2 years, 1 month ago

Solution verified Verified by Toppr 2x 2 +x−6 Completing the square, ⇒x 2 + 2 x−3=0 ⇒x 2 + 2 x+ 16 1− 16 1−3=0 ⇒(x+ 4 1) 2 − 16 49=0 ⇒(x+ 4 1− 4 7)(x+ 4 1+ 4 7)=0 ⇒(x− 2 3)(x+2)=0 ⇒x= 2 3,−2 Solve any question of Quadratic Equations with:-. This is wrong. 3/2,-2 this right

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Faisal Khan 2 years, 1 month ago

Solution verified Verified by Toppr 2x 2 +x−6 Completing the square, ⇒x 2 + 2 x −3=0 ⇒x 2 + 2 x + 16 1 − 16 1 −3=0 ⇒(x+ 4 1 ) 2 − 16 49 =0 ⇒(x+ 4 1 − 4 7 )(x+ 4 1 + 4 7 )=0 ⇒(x− 2 3 )(x+2)=0 ⇒x= 2 3 ,−2 Solve any question of Quadratic Equations with:-

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Bhavesh Upadhyay 2 years, 1 month ago

Completing the square method paper me nahi ayega

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Nutan Kuldeepkar 2 years, 1 month ago

What is family law

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