# Question: write out the trig identities for sina b cosa...

###### Question details

Write out the trig identities for sin(a + b), cos(a + b) (3
forms), cos(a) cos(b) (in terms of cos(a + b) and cos(a − b), and
sin(a) cos(b) in terms sin(a + b) and sin(a − b). These may all be
found on Brightspace.