Posted by **Trig** on Sunday, November 9, 2008 at 2:12pm.

Prove that (cosy/1+siny) + (1+siny/cosy) = 2secy

## Answer this Question

## Related Questions

- Trigonometry Help - Simplify: sin(x-y)cosy+cos(x-y)siny = (sinxcosy-cosxsiny)...
- Trigo help! - Ok, i've tried this question, and it brings me to no answers. ...
- Math - Suppose f(x) = sin(pi*cosx) On any interval where the inverse function y...
- math - sinx+ siny/ (cosx+cosy)= tan 1/2 (x+y) prove this identity
- trig - Okay, I've been getting some of these, but I can't seem to verify this ...
- calc - what is the derivative of sinx- cosy = 0 in its simplest form? I got to ...
- maths (trigonometry) - please solve these if possible Q1. If sinx +siny=3(cosy-...
- AP Calculus - I previously posted this but had a mistake in it. Determine dy/dx...
- Trigonometry - If Hello, I have been working on this one problem for a while now...
- math - Angles x and y are located in the first quadrant such that sinx=3/5 and ...