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

If `Sin theta+ Sin^(2) theta=1 and cos a cos^(12) theta+ b cos ^(12) theta+ b cos^(10) theta+ c cos^(8) theta+d cos^(6)-1 theta`= then `(b+c)/(a+d)`

A

1

B

2

C

`-2`

D

3

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The correct Answer is:
D
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