Let a, b ≠kπ : .

Prove: cos^{2}\frac{\alpha- \cos^{2}\frac{\alpha- \beta }{2}=\frac{c^{2}}{a^{2}+b^{2}}.

Printable View

- Feb 23rd 2011, 12:38 PMarmequality trigonometry
Let a, b ≠kπ : .

Prove: cos^{2}\frac{\alpha- \cos^{2}\frac{\alpha- \beta }{2}=\frac{c^{2}}{a^{2}+b^{2}}. - Feb 24th 2011, 08:47 AMSudharaka
- Feb 26th 2011, 01:08 PMmr fantastic