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

If `A=sin^(2)theta+cos^(4)theta`, then find all real values of `theta`.

A

`1 leP le2`

B

`3/4 leP le1`

C

`1/2leP le3/4`

D

`1/4leP le1/2`.

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