find the value of (sin theata+cos theta)square+(cos theata-sin theata)square
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(sin theta+cos theta )^2 + (cos theta - sin theta A)^2
=sin^2theta+cos^2theta +2sin theta.cos theta +sin^2theta +cos ^2 theta - 2 sin theta.cos theta
=1+2 sin theta.cos theta+1-2sin theta.cos theta (sin^2theta+ cos^2theta=1)
=1+1
=2
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