Given, We Know that, cos2x=1-2sin 2 x ⇒ 1-cos2x=2sin 2 x Substitute this in the given, = dx = dx = ∫cosec 2 x dx = -cotx +c

Evaluate:

Given,

_{We Know that, cos2x=1-2sin}²x

⇒ 1-cos2x=2sin²x

Substitute this in the given,

= dx

= ∫cosec² x dx

= -cotx +c