Question

Prove: 2 csc 2x = csc^2 x + tan x

Answer 1

This isn't true. If
`x=\frac\pi4`, you get


`2\csc\left(2*\frac\pi4\right)=2\csc\frac\pi2=2`

while


`\csc^2\frac\pi4+\tan\frac\pi4=\left(\sqrt2\right)^2+1=3`