Question

(sin theta+costheta)wholesquare +(sin theta-cos theta)whole square =2 prove this

Answer 1

(sin@+cos@)*2 = sin@*2+cos@*2+2cos@sin@
=1+sin 2@.............(1)
(sin@-cos@)*2. =sin@*2+cos@*2-2cos@sin@
=1-sin 2@...............(2)
(1)+(2) = 1+sin 2@+1-sin 2@
=2

Answer 2

This is the solution. Hope it helps.

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