यदि sin theta+sin^(2)theta=1, तो सिद्ध क...

यदि `sin theta+sin^(2)theta=1`, तो सिद्ध कीजिए `cos^(12) theta+3cos^(10)theta+3cos^(8) theta+cos^(6)theta-1=0`

A

0

B

1

C

2

D

`-1`

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The correct Answer is:

A

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