# Math Help - pi/12

1. ## pi/12

how can i use the difference identity to find pi/12, because i keep getting 0 when i try it.

2. Are you sure you're not trying to find $\displaystyle \sin{\frac{\pi}{12}}$ or $\displaystyle \cos{\frac{\pi}{12}}$?

3. Ii is Cos(pi/12) i guess i looked at it wrong, i did not see the Cosine

4. Either evaluate $\displaystyle \cos{\left(\frac{\pi}{3} - \frac{\pi}{4}\right)}$ using the angle difference identity, or evaluate $\displaystyle \cos{\left(\frac{1}{2}\cdot \frac{\pi}{6}\right)}$ using the half angle identity.