Answer :

email4prasanjit
The answer is −2cos(θ)sin(θ)+2+sin(2θ).    (sin (θ) − cos (θ))^2 − (sin (θ) + cos (θ))^2 was ur question right?
ill write s for sine and c for cos:

(s - c)^2 - (s + c)^2
= s^2 - 2sc + c^2 - (s^2 + 2sc + c^2
=  -4sc

Its the first choice

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