Question

Algebra 2 help

Answer 1

one of them is 1/2

Answer 2

its either C or D?

Answer 3

sin(a+b)=sina*cosb+cosa*sinb could be useful or you can see it knowing that in the 2nd quadrant only the sin is positive

Answer 4

cos 150 = -0.86602540378443864676372317075294
sin 150 = 0.5

Answer 5

sin(180-30) is the same as the sin of 30 because in the 2nd quadrant sin is positive

Answer 6

so you are correct yes

Answer 7

okay. will cos 150 = -0.86602540378443864676372317075294
sin 150 = 0.5 i just need them in fraction form. one is 1/2. i think its either C or D.

Answer 8

So it would be C?