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Given A=sin ^(2) theta+cos ^(4) theta th...

Given `A=sin ^(2) theta+cos ^(4) theta` then for all real `theta`

A

`1le A le 2`

B

`(3)/(4)le A le 1`

C

`(13)/(16) le A le 1`

D

`(3)/(4) le A le (13)/(16)`

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