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

tan20*tan40*tan60*tan80 can be written as,
tan(20)*tan(60-20)*tan(60+20)*tan(60)
LHS =tan(3×20)*tan(60)
[Using the formula, tan(x)*tan(60-x)*tan(60+x) = tan(3x)]
=tan(60)*tan(60)
=sq.root(3)* sq.root(3)
=3

3Thank You

ANSWER

Find the equation of the circle which passes through the point coast to minus 2 question and coast 344 West 1 and whose Centre lies on the line X + Y is equal to 2

Posted by Ranjeet Raj 7 years, 7 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Prove that (cosA+sinB)2=4cos2 A-B

Posted by Ranjeet Raj 7 years, 7 months ago

CBSE > Class 11 > Mathematics

1 answers

Ranjeet Raj 7 years, 7 months ago

&×**#*÷*÷*÷*,÷&#&&#&#&#**#*#*×//×/×/×_€×£÷£#&#;#:"×_×€÷£¥÷; $;:@:/+€×*÷

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Cos20' cos40' cos60' cos80' =1/16. Express as an algebraic sum of sines and cosines

Posted by Khushi Singh 7 years, 7 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

What is the formula of logbasea m

Posted by Ritik Mangrinda 7 years, 7 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

If a+b+cis not equal to zero and b+c÷a,c+ a÷b,a+b÷care in ap then prove that 1÷a,1÷b,1÷care also un ap

Posted by Ajay Kumar 7 years, 7 months ago

CBSE > Class 11 > Mathematics

2 answers

Ajay Kumar 7 years, 7 months ago

No one

0Thank You

Ajay Kumar 7 years, 7 months ago

Please answer it

0Thank You

ANSWER

Tanπ/8

Posted by Prabhakar Sharma 7 years, 7 months ago

CBSE > Class 11 > Mathematics

1 answers

Gaurav Kumar 7 years, 7 months ago

Use tan(x/2) formula and x=45 which gives ans (root2 -1)

2Thank You

ANSWER

Cube roots of complex numbers

Posted by Sudipa Deb 7 years, 7 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

solve inequlities 1/x-1greter than 1/x+1

Posted by Deepak Kumar 7 years, 7 months ago

CBSE > Class 11 > Mathematics

1 answers

Sarika Kamboj 7 years, 7 months ago

Question is wrong

1Thank You

ANSWER

If n(a)=10 and n(b)=8 then find a intersection b and a union b

Posted by Mayank Gahlyan 7 years, 7 months ago

CBSE > Class 11 > Mathematics

1 answers

Shivshant Upadhyay 7 years, 7 months ago

fie, and for union 18

2Thank You

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If cosecp-sinp=m.and secp-cosp=n. Then eliminate p

Posted by Bhartendu Kumar 5 years, 8 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

3x+5y=15

Posted by Prianka Police 7 years, 7 months ago

CBSE > Class 11 > Mathematics

1 answers

Chemistry Chemistry 7 years, 7 months ago

X=0,y=3;X=5,Y=0

2Thank You

ANSWER

If f(x)=ax+b,where a and b are integers,f(-1)=-5 and f(3)=3, then a and b are equal to

Posted by Krishna Singhal 7 years, 7 months ago

CBSE > Class 11 > Mathematics

1 answers

Kanshika Kanishka 7 years, 7 months ago

Put x=-1 and f (-1)=-5 in given f (x) Thus, -5=-a+b 3= 3a+b on subtracting we will get a=2 and b=-3

0Thank You

ANSWER

Can you provide me NCERT EXEMPLAR SOLUTIONS of maths

Posted by Sambit Kumar Pradhan 7 years, 7 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Prove sin (A+B)=sinA cosB+cosA sinB

Posted by Tushar Dixit 7 years, 7 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

When is cbse class 10 and class12 result comes

Posted by Idris Kumar 7 years, 7 months ago

CBSE > Class 11 > Mathematics

1 answers

Navneet . 7 years, 7 months ago

On 28 or 30 may

0Thank You

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Is Allen good Institute for neet, i want to take admission there

Posted by Shatayu Ganvir 7 years, 7 months ago

CBSE > Class 11 > Mathematics

1 answers

Radhika Chaudhary 7 years, 7 months ago

Yes but aakash is better than that

0Thank You

ANSWER

If I distribute 0 apple to 0 student , then how many apple / apples each student will get ?

Posted by Ashtrix Official 5 years, 8 months ago

CBSE > Class 11 > Mathematics

4 answers

Shivshant Upadhyay 7 years, 7 months ago

1Thank You

Radhika Chaudhary 7 years, 7 months ago

Obviously 0

0Thank You

Gaurav Singh 7 years, 7 months ago

0Thank You

Tanishka Andotra 7 years, 7 months ago

0/0

0Thank You

ANSWER

If 5sinx=3 then secx+tanx/secx-tanx=

Posted by Adi Rathore 7 years, 7 months ago

CBSE > Class 11 > Mathematics

1 answers

Ashtrix Official 7 years, 7 months ago

sin x = 3/5 ...now u can do it

1Thank You

ANSWER

Solve limx->0 x(cosx +cos2x)/sinx

Posted by Shubham Kumar Gupta 7 years, 7 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

provide supplementary material exercises solutions

Posted by Muskan Yadav 7 years, 7 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

FInd the sum of 10^3+11^3........+20^3

Posted by Abhik Bansal 7 years, 7 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

1+1/(1+2)+1/(1+2+3)+ ........+1/(1+2+3+....n)=2n/(n+1) Prove it using pmi

Posted by Krishna Kant 7 years, 7 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Who made numbers

Posted by Ankush Dubey 7 years, 7 months ago

CBSE > Class 11 > Mathematics

1 answers

Amanpreet Singh 7 years, 7 months ago

Leonardo Pisano Bigollo

0Thank You

ANSWER

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