Verify trig identity
1-cos^2x = (tanx)(cosx)(sinx)
Since Sin^2 x + cos^2 x =1
Sin^2 x =1- cos^2x
Hence Left side = 1-cos^2x = sin ^2x
Right side = (tanx)(cosx)(sinx)_
= sinx/cosx * cos x * sinx
= left side
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