Question

solve for y. dy/dt=sin(t-y)+sin(t+y). hint: use trig id

Answer 1

what trig id??

Answer 2

Your second part transforms into 2cos(y(t))sin(t). That the trig identity you want to use.

Answer 3

thank you

Answer 4

Glad to help :)

Answer 5

i found something similar to yours...
sinu+sinv=2sin((u+v)/2)cos((u-v)/2)
=2sin[((t-y)+(t+y))/2]cos[((t-y)+(t+y))/2]
=2sin(t)cos(-y)
so now i'm confused

Answer 6

or...are u and v derivatives?

Answer 7

o nevermind, got it