I need help wit a problem....
1- cos = Sin
1+sin
Having trouble after i multipying for common denominator
I used LaTeX, you can click the image to see how I done it - you can find out more here: http://www.mathhelpforum.com/math-help/latex-help/
I'm not sure how to try it, I've done the difference of two squares but that only gives
Using the Pythagorean identity gives only
Edit: this doesn't appear to be an identity - counterexample