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8 cos ^(4) x - 8 cos ^(2) x + 1 is equa...

`8 cos ^(4) x - 8 cos ^(2) x + 1 ` is equal to

A

cos4x

B

sin4x

C

cos2x-sin 4x

D

cos2x+sin 4x

Text Solution

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The correct Answer is:
A
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IPUCET PREVIOUS YEAR PAPERS-IPU QUESTION PAPER 2018-MATHEMATICS
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