# Math Help - sin and tan

1. ## sin and tan

By writting 75 as 30+45, find the exact values of sin 75 and tan 75

THANKS!

2. Use the identities $\sin(a+b)=\sin a\cos b+\sin b\cos a$

and $\tan(a+b)=\frac{\tan a+\tan b}{1-\tan a\tan b}$