Question

Pre-Cal.

A.)sinb
B.)sina
C.)cosa
D.)cosb

Answer 1

know the formula for sin(a+b)
and sin(a-b) ?

Answer 2

It is the formula of compound angle

Answer 3

no i dont

Answer 4

\(\large \sin(a+b)=\sin a\cos b+\cos a\sin b\\ \large \sin(a-b)=\sin a \cos b -\cos a\sin b\)
just plug in and simplify!

Answer 5

got sinB

Answer 6

i means sin B is not with sin a, what's with sin a ?