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Evaluate the following (sin theta +co...

Evaluate the following
` (sin theta +cos theta )^(2) +(sin theta -cos theta )^(2) `

A

`2 sin^2 theta + cos^2 theta`

B

`2 `

C

`2 sin^2 theta + 4 cos^2 theta`

D

`2 sin^2 theta`

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