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Find the value of :

Submitted by alpha on Mon, 10/26/2009 - 08:25.

$ 2(\cos^2 76^0+\cos^216^0-\cos76^0\cos16^0)=1+\cos 152^o+1+\cos32^o-\cos 60^o-\cos 92^o=\frac{3}{2}+\cos 32^o-\cos 28^o+\sin 2^o=\frac{3}{2}-2\sin 30^o\sin 2^o+\sin 2^o=\frac{3}{2} $
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