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If A= cos^(4)theta+sin^(2)theta , then f...

If `A= cos^(4)theta+sin^(2)theta` , then for all values of `theta` :

A

`1 le A le 2`

B

`13/16 le A le 1`

C

`3/4 le A le 13/16`

D

`3/4 le A le 1`

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The correct Answer is:
D
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