Prove cosec2A-cot2A=tanA
Cosec2A - cot2A= tanA
Left hand side=1/sin2A - cos2A/sin2A
=(1- cos2A)/sin2A
=(1-(1- 2 sin^2 A)/ 2sinAcosA
=(1-1 + ( 2 sin^2 A))/ 2sinAcosA
=sinA/cosA
=tanA
Therefore left hand side of the equation is equal to the right hand side as proved above.
ST
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