So I had an expression

sqrt( cos^2(t) + sin^2(t) + (1/cos^2(t))^2 )

and I simplifed it to sqrt( 1 + (1/cos^2(t))^2 )

And what next?..

and been staring at last expressions for like 10 minutes :D, feel myself really dumb, maybe someone can help?

Guest Oct 23, 2017