Question

Cscy-siny=cosy(coty)

Answer 1

Explanation:

`\csc y - \sin y = (1)/(\sin y) - \sin y`

`\:\:\:\:\:\:\:\:=(1 - \sin^2y)/(\sin y)`

`\:\:\:\:\:\:\:\:= (\cos^2y)/(\sin y)`

`\:\:\:\:\:\:\:\:=\cos y \left((\cos y)/(\sin y)\right)`

`\:\:\:\:\:\:\:\:= \cos y \cot y`