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if sin^3x sin3x=sum Cm cos^mx where c0,...

if `sin^3x sin3x=sum C_m cos^mx ` where `c_0,c_1,c_2.....c_6` are constants then :

A

`C_(0)+C_(2) +C_(4)+C_(6) = 0`

B

`C_(1)+C_(2)+C_(3) = -1`

C

`2C_(2) -4C_(6)=0`

D

`C_(4) +2C_(6) = 0`

Text Solution

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The correct Answer is:
A
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