Question

express as a single trig formula, then evaluate:
sin45°cos15°-cos45°sin15°

Answer 1

look at the equation
sinxcosy-cosxsiny
what is that?

Answer 2

subtraction?

Answer 3

haha
no like is it sin(x+y), sin(x-y), cos(x+y), or cos(x-y) ?

Answer 4

you do know what those are right? and how to expand those? o.O

Answer 5

oh yeah lol

Answer 6

sometimes you just have to look for patterns.. :/

Answer 7

oh lol nvm! thanks! i got it :)

Answer 8

it should be sin (45-15)