Question

Find the exact value of the expression.

sin 265° cos 25° - cos 265° sin 25°

Answer 1

hint:

sin(x-y) = sin(x)cos(y) - cos(x)sin(y)

Answer 2

I've asked this question before, but it was the wrong answer.

Answer 3

Let me find the link to the old post......

Answer 4

http://openstudy.com/study#/updates/5213d9dde4b0450ed75ddc8d

Answer 5

what do you get when you use the identity I posted

Answer 6

I just need to know if my answer was wrong, or the online college is just messed up.

Answer 7

you are saying the answer is -1/2 right?

Answer 8

if so, then you are incorrect

Answer 9

Ok, thanks.

Answer 10

yw