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If sin theta + sin ^(2) theta =1 and cos...

If `sin theta + sin ^(2) theta =1 and cos ^(12) theta + a cos ^(10) theta + bcos ^(8) theta + c cos ^(6) theta + d =0,` then

A

`ab = cd`

B

` ac = bd`

C

`ab +cd =0`

D

`ac +bd=0`

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The correct Answer is:
D
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