Question

For 0 degrees <= theta < 1080, find all the values of theta so that cos theta = -((sqrt3)/2)

Answer 1

hey

Answer 2

first do theta=arccos(-((sqrt3)/2))

Answer 3

150 and 210 degs for cos?

Answer 4

Yes. So those are the solutions between 0 and 360. To find the solutions between 360 and 720, add 360 to each of those answers.

Answer 5

Then to find the solutions between 720 and 1080, add 360 to each of those answers.

Answer 6

Now you are done.