I need help wit a problem....

1-cos= Sin

1+sin

Having trouble after i multipying for common denominator

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- May 9th 2010, 09:23 AMdmidgetproving identities
I need help wit a problem....

1-__cos__= Sin

1+sin

Having trouble after i multipying for common denominator - May 9th 2010, 09:25 AMdmidget
- May 9th 2010, 09:27 AMe^(i*pi)
- May 9th 2010, 09:32 AMdmidget
- May 9th 2010, 09:44 AMe^(i*pi)
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

- May 9th 2010, 10:01 AMdmidget
- May 9th 2010, 12:36 PMe^(i*pi)