# IntMath forum

## Latest posts by Alexandra

- Show (1-sinx)/(1+sinx)= (tanx-secx)^2 [Solved!] 2016-01-03, 05:45
- Prove the trig identity cosx/(secx+tanx)= 1-sinx [Solved!] 2015-12-29, 06:45
- Re: Trig identity (sinx+cosx)^2tanx = tanx+2sin^2x [Solved!] 2015-12-27, 09:48
- Prove trig identity 2cos^2x-1=cos^4x-sin^4x [Solved!] 2015-11-25, 09:54