CBSE > Class 11 > Mathematics | CBSE Board | Homework Help

L.H.S root2+underroot2(1+cos4x) =root2+undreroot2*2cossq2x =root2+2cos2x =root2*(1+cossqx) =root2*2cossqx =2cosx (* it means multiply) we use 1+cossqA=2cossqA in this ques. two times

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2 sin square beta + 4 cos (alpha + beta )sin alpha sin beta + cos (2alpha+2beta)=cos2alpha

Posted by Suraj Chaudhary 7 years, 3 months ago

CBSE > Class 11 > Mathematics

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Sin theta + sin 2 theta + sin 3 theta +sin 4 theta =0

Posted by Akanksha Shrivastava 7 years, 3 months ago

CBSE > Class 11 > Mathematics

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(6+n)P2:(6-2)P2=56:12

Posted by Pranjal Shukla 7 years, 3 months ago

CBSE > Class 11 > Mathematics

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The angles of a quadrilateral are in a.p. whose common difference is 10 degree . Find the angles .

Posted by Shubhanjali Singh Gaur 7 years, 3 months ago

CBSE > Class 11 > Mathematics

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1+2+3+........+n<1/8(2n+1)^2 prove using P.M.I

Posted by Aman Yadav 7 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Kunal Kathpal 7 years, 3 months ago

Very easy NCERT question

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यदि समान वाषि्क ब्याज की दर से समान समय के x रुपया का साधारण ब्याज y रुपया है और y रू. का साधारण ब्याज z रुपया हो तो मान क्या होगा?

Posted by Sakshi Mishra 7 years, 3 months ago

CBSE > Class 11 > Mathematics

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A tree is broken at a height of 5meter from the ground and its top touches the ground at a distance of 12 meter from the base of the tree find the original height of the tree

Posted by Shubham Kamatkar 7 years, 3 months ago

CBSE > Class 11 > Mathematics

3 answers

Akash Choudhary Dav Gandhinagar 7 years, 3 months ago

Class 10 mai hai ka bhai

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Keshav Bindal 7 years, 3 months ago

13 + 5 = 18 meter

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Mayank Bhunia 7 years, 3 months ago

Hypotenuse + 5

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Lim sinx\ x X 0

Posted by Prachi Shukla 7 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Amar Kumar 7 years, 3 months ago

Fool there answer is 0.9658327

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2naC3 :nC3=11:1

Posted by Swayam S 7 years, 3 months ago

CBSE > Class 11 > Mathematics

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Chapter 3 solutions

Posted by Vivek Tiwari 7 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Mr. Thakur 7 years, 3 months ago

This is also given in this app.

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Hii there

Posted by Aditi Sinha 5 years, 8 months ago

CBSE > Class 11 > Mathematics

3 answers

Pragati Pandey 7 years, 3 months ago

Hello

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Ritu Thapliyal 7 years, 3 months ago

Hlo

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Mr. Thakur 7 years, 3 months ago

Hii

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How many of u guys have taken maths as additional!??

Posted by Aditi Sinha 7 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Akash Choudhary Dav Gandhinagar 7 years, 3 months ago

I also☺☺☺☺

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???. Pragati 7 years, 3 months ago

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nA=35 andnB=42 ,n A intersecrion B=1 so find that A-B=?

Posted by Ankit Shareen 7 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Mayank Bhunia 7 years, 3 months ago

n(A-B)=34 . I can be wrong but i did it this way that nA-B equals to no. Of elements in A which are not present in B . But nA^B=1 says that there is one common element in A and B.so we remove that element. And get 34 elements

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Lakshya Singh 7 years, 3 months ago

n(A-B)=76

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Cos20 ^cos40^cos60^cos80^=1/16

Posted by Himanshu Mishra 7 years, 3 months ago

CBSE > Class 11 > Mathematics