1.

2sina0-118. Prove that -tane-cotθcosesineOR

Answer»

2sin²x-1/cosx*sinx = sinx/cosx - cosx/sinx

2sin²x-1/cosx*sinx = sin²x-cos²x/sinx*cosx

2sin²x-cos²x-sin²x = sin²x-cos²x

= 0

Hence proved



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