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

LHS=cosA+sinA−1cosA−sinA+1 dividing Nr and Dr by sinA we get, =sinAcosA+sinAsinA−sinA1sinAcosA−sinAsinA+sinA1 =cotA+1−cosecAcotA−1+cosecA =cotA+1−cosecAcotA+cosecA−(cosec2A−cot2A) =cotA+1−cosecA(cotA+cosecA)(1−cosecA+cotA) =cotA+cosecA=RHS

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Balaji B 5 years ago

Multiplying the numerator and denominator with sinA : SinA [CosA – SinA +1]/ SinA [CosA + SinA –1] SinACosA–Sin^2A+SinA/ SinA [CosA +SinA –1] SinACosA+SinA –[1–Cos^2A]/ SinA[CosA+SinA–1] SinACosA+SinA–[(1–CosA)(1+CosA)] / SinA[CosA+SinA–1] SinA[CosA+1]–[(1–CosA)(1+CosA)] / SinA [CosA + SinA–1] (CosA+1)(SinA–1+CosA)/ SinA (CosA + SinA–1) (CosA+1)(SinA+CosA—1)/ SinA (CosA+SinA–1) (CosA+SinA–1) will get cancelled So , CosA+1/SinA is left Dividing (CosA) and (1) individually by (SinA), we get CotA + CosecA Which is equal to R.H.S Hence Proved

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A bag contains lemon flavoured candies only.malini takes out one candy without looking into the bag.what is the probability that she takes out.1)an orange flavour candy 2)a lemon flavoured candy

Posted by Sn Kumar 5 years ago

CBSE > Class 10 > Mathematics

2 answers

Harmandeep Kaur 5 years ago

1.Probability of orange flavored candy =0 because there is only lemon flavoured candy. So it is impossible 2.probability of lemon flavoured candy =1

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Divya Soni 5 years ago

1. 0 ( bag contains only lemon flavoured candy ) 2. Let total no. of candy is 10 No. of candies which are lemon 10 10/10 = 1

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ANSWER

Case study of coordinator geometry

Posted by Sachin Yadav 5 years ago

CBSE > Class 10 > Mathematics

2 answers

Life Is Full Of Struggle 5 years ago

Where is question

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Naru Karthik 5 years ago

Send me the questions

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ANSWER

Is ncert book enough for math standard board 2021?

Posted by Hrithika Gattupally 5 years ago

CBSE > Class 10 > Mathematics

5 answers

Rudraksh Rai Udaiwal 5 years ago

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Prerna Jain 5 years ago

There's no need to refer 100s of books just make ur concepts clear

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Ra Dhe 5 years ago

Yes but make your concept clear

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Atul Kumar 5 years ago

Try rs aggrawal or rd Sharma book

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Vansh Jhawar 5 years ago

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ANSWER

Prove that - cosθ / (1-sinθ) = (1+sinθ) / cosθ

Posted by Aachal Satwan 5 years ago

CBSE > Class 10 > Mathematics

1 answers

A K47 5 years ago

cos∅/ (1-sin∅) multiply with 1+sin∅ in both numerator and denominator, cos∅×(1+sin∅)/(1-sin∅)×(1+sin∅) = cos∅(1+sin∅)/1²-sin²∅ [ 1=sin²∅+cos²∅ therefore 1-sin²∅ = cos²∅] cos∅(1+sin∅)/cos²∅ = 1+sin∅/cos∅

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A number x is choosen from the number -3,-2,-1,0,1,2. Find the probability that 1*1<3.

Posted by Ansh Kumar Sharma 5 years ago

CBSE > Class 10 > Mathematics

4 answers

Vansh Jhawar 5 years ago

Probably is 1

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Siddharth Tripathi 5 years ago

Because total no. of favourable outcomes/total no. Of outcomes

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Siddharth Tripathi 5 years ago

5/6

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Siddharth Tripathi 5 years ago

The probability is

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ANSWER

Find the largest number that divides 31 and 99 leaving remainder 5 and 8 respectively

Posted by Krish Patidar 5 years ago

CBSE > Class 10 > Mathematics

5 answers

Siddharth Tripathi 5 years ago

Answer is 2??

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Siddharth Tripathi 5 years ago

Now, we use Euclid's division algorithm/lemma

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Siddharth Tripathi 5 years ago

31-5 and 99-5, we get 26 and 94

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Siddharth Tripathi 5 years ago

First we leave remainder 5

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Ansh Kumar Sharma 5 years ago

8 and 5

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ANSWER

Ritu can row downstream 20 km in 2 hours and upstream 4 km in 2 hours. Find her speed of rowing in still water and the speed of the stream

Posted by Madhu Madhu 5 years ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Find a,b,c if it is given that the numbers a,7,b,23,c are in ap

Posted by Indira Priyadharshini 5 years ago

CBSE > Class 10 > Mathematics

1 answers

A K47 5 years ago

(a+d)=7 and (a+3d)=23 by subtracting equations we get d=8. putting this value in a+d=7 we get a=-1. b=15 and c=31

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ANSWER

If X equals to a cos square theta + b sin square theta then show that x minus A into B minus x is equals to a minus b whole square into sin square theta into cos square theta .

Posted by Hemang Dubey 5 years ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Mam please buy a bio

Posted by Piyush Kumar 5 years ago

CBSE > Class 10 > Mathematics

3 answers

Prerna Jain 5 years ago

??????

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Malaika Sharma 5 years ago

??????

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Ravi Kumar 5 years ago

Sir I can ask doubt

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ANSWER

Prove that Cos theta - sin theta+ 1 / Sin theta + cos theta - 1 = 1 / Cosec theta - Cot theta .

Posted by Hemang Dubey 5 years ago

CBSE > Class 10 > Mathematics

1 answers

Nitin Maurya 5 years ago

HGWGWZ

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ANSWER

Is ncert maths sufficient for board 2021??

Posted by Saloni Singh 5 years ago

CBSE > Class 10 > Mathematics

4 answers

Rudraksh Rai Udaiwal 5 years ago

If you have taken basic then practice NCERT 100 % and any other side book you wish . But you have taken standard the you should practice NCERT full as well as side book to , like, examplar.

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Anurag Singh 5 years ago

Ya ncert prefer

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Sayantani Sen 5 years ago

Yes

1Thank You

Hemang Dubey 5 years ago

If you have taken basic then practice NCERT 100 % and any other side book you wish . But you have taken standard the you should practice NCERT full as well as side book to , like, examplar.

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ANSWER

Q. Which of the following are APs ? If they form an AP, find the common difference d and write three more terms. (xi) a,a²,a³,a⁴,... Please help fast it's urgent...

Posted by Annanya Gupta 5 years ago

CBSE > Class 10 > Mathematics

4 answers

Oviya Arumugam 5 years ago

No it is not in AP

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Aadi __ 5 years ago

Not forming a ap U take a as 6 then solve it... it will not come

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Gouri 15 5 years ago

From*

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Gouri 15 5 years ago

No it not gorm an ap

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ANSWER

The sum of 3rd and 7th term of an ap is 6 and product Thier 8. Find the sum of the first 16th term of the ap.

Posted by Muhammed Hanan 5 years ago

CBSE > Class 10 > Mathematics

2 answers

Kavya Chanana 5 years ago

76, 20

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Annanya Gupta 5 years ago

so using formula for n th term a_n=a+(n-1)da n =a+(n−1)d a = first term n = no. of terms d = common difference So given a + (3-1)d + a (7-1)d = 6 2a + 8d = 6 a + 4d = 3 a = 3 - 4d (a + 2d)(a + 6d) = 8 (3 - 2d)( 3 + 2d) = 8 {substituting a = 3 - 2d} 9 - 4d² = 8 d = +1/2 and - 1/2 so when d = +1/2 then a = 3 - 2 = 1 and when d = -1/2 a = 3 + 2 = 5 so using formula for S_n=\frac{n}{2}[2a+(n-1)d]S n = 2 n [2a+(n−1)d] when d = +1/2 S_n=\frac{16}{2}[2*1+(16-1)d]S n = 2 16 [2∗1+(16−1)d] S_n=76S n =76 Similarly when d = -1/2 S_n=20S n =20 Hope this helps you!.....

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If the first 6th term of an ap is 36 and that of first 16th term is 256,find the sum of the first 10 term?

Posted by Muhammed Hanan 5 years ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Find the 21st term of the A.P: -4,-3,-1,...

Posted by Pandit Ji 5 years ago

CBSE > Class 10 > Mathematics

5 answers

Simmi Fagna 5 years ago

The 21st term of the A.P:16

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Vansh Jhawar 5 years ago

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Anurag Singh 5 years ago

answer is tn=16

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Annanya Gupta 5 years ago

The terms are not AP. Please recheck your question.....

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Adithya Dev A 5 years ago

It is not an A.P. Please verify the question.

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ANSWER

Solve the following equation 2 X square + X - 4 is equal to zero

Posted by S.K.Mahika Mahika 5 years ago

CBSE > Class 10 > Mathematics

1 answers

Nitin Kumar 5 years ago

Here we have to use quadratic formula. » D=(b)^2-4ac. » D=(1)^2-4(2)(-4). » D= 1+32. » D= 33. Now using quadratic formula: » x=(- b±√D)/2a. » x=(-1±√33)/4. » x=(-1+33)/4,(-1-33)/4. » x=32/4 & -34/4. » x=8 and -17/2. ??????????

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Draw a line segment of length 7.6 cm and divide it in the ratio 5:8. Measure the two parts.

Posted by Mayank Raj 5 years ago

CBSE > Class 10 > Mathematics

2 answers

Muhammed Hanan 5 years ago

Easy ?

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Anish Kumar •1000Year Ago 5 years ago

Easy question ?

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ANSWER

If the area of three adjacent faces of a cubiod are X,Y and Z respectively,then find the volume of cubiod in term of x, y and z.

Posted by S J 5 years ago

CBSE > Class 10 > Mathematics

2 answers

Laxmanraj Hulli 5 years ago

Write the formula to find the volume of a frustum of a cone

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Lizyba 28 5 years ago

X=lb Y=bh Z=lh XYZ=l^2 b^2 h^2 Volume of cuboid=lbh l^2 b^2 h^2= XYZ

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2 men and 7 boys can do work in 4 days .it is done by 4 men and 4 boys in 3 days how long it take for 1 men or 1 boy to do work.

Posted by Rohit Sharma 5 years ago

CBSE > Class 10 > Mathematics

1 answers

Adithya Dev A 5 years ago

Equations would be 2/x + 7/y = 1/4 and 4/x + 4/y = 1/3 where time taken for work by one man is x and time taken by one boy is y.

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ABCD is a rectangle formed by the points A(-1,-1) , B(-1,4) , C(5,4) , D(5,-1) P, Q ,R and S are the mid point at AB , BC ,CD and DA is PQRS is a square?

Posted by Tanisha Shekhawat 5 years ago

CBSE > Class 10 > Mathematics

1 answers

Adithya Dev A 5 years ago

First check if AC and BD are of equal length. Then, check if AB and BC are equal. Then, we can prove it is a square.

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ANSWER

Solve the following pair of linear equation by the elimination method and the substitution meyhod

Posted by Monalika Verma 5 years ago

CBSE > Class 10 > Mathematics

2 answers

Annanya Gupta 5 years ago

Your question seems to be incomplete. Please verify your question which u asked....

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Nandani Jaiswal 5 years ago

Please provide the details of the question ??....

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ANSWER

Find the product of two consecutive even natural numbers 44 × 46 without actual multiplication

Posted by Sarah Mariyam 5 years ago

CBSE > Class 10 > Mathematics

1 answers

Adithya Dev A 5 years ago

44 * 46 = (45-1)(45+1) = 45^2-1^2 = 2025-1 = 2024//

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ANSWER

Suggest some ways improve marks in mathematics

Posted by Good Student 5 years ago

CBSE > Class 10 > Mathematics

4 answers

Bhoomika Verma 5 years ago

Do Practice...

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Vaishali 10 5 years ago

Practice practice practice....

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Oviya Arumugam 5 years ago

Daily practice help you to get mark.u should be through in ncert book. Refer some guide.daily atleast spend an hour to maths subject it's enough to get good mark.

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Sona Benoy 5 years ago

1. Practise practise and practice 2. Ncert should be like God 3. Sample papers..anyone in perfect 3 he sittings

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ANSWER

if √3sinθ-cosθ=0, and 0<θ<90°, find the value of θ

Posted by Om Kumar 5 years ago

CBSE > Class 10 > Mathematics