( 1+cos ""(pi)/(10) )( 1+cos ""(3pi)/( 1...

`( 1+cos ""(pi)/(10) )( 1+cos ""(3pi)/( 10)) (1+cos ""(7pi)/( 10 )) (1+ cos ""(9pi)/(10))` बराबर है

A

`(1)/(16)`

B

`(3)/(16)`

C

`(5)/(16)`

D

`(7)/(16)`

Verified by Experts

The correct Answer is:

A

( 1+cos ""(pi)/(10) )( 1+cos ""(3pi)/( 10)) (1+cos ""(7pi)/( 10 )) (1+...
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The value oif the expressin (1+(cos pi)/(10))(1+(cos(3 pi))/(10))(1+(c...
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सिद्ध कीजिए की ( 1+cos ""(pi)/(10) )( 1+cos ""(3pi)/( 10)) (1+cos ""(...
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Prove that (1+cos""pi/10)(1+cos""(3pi)/10)(1+cos""(7pi)/10)(1+cos""(9p...
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Prove that (1+cos""pi/10)(1+cos""(3pi)/10)(1+cos""(7pi)/10)(1+cos""(9p...
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প্রমাণ করো : (1+cos((pi)/10))*(1+cos((3pi)/10))*(1+cos((7pi)/10))*(1+c...
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প্রমাণ করো : (cos((pi)/10)+isin((pi)/10))(cos((2pi)/10)+isin((2pi)/10)...
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The principal value of cos^(-1) {1/sqrt2 ("cos"(9pi)/10 - "sin"(9pi)/1...
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cos^(2)(pi/10) + cos^(2) ((2pi)/5)+ cos^(2)((3pi)/5) + cos^(2)((9pi)/1...
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