# trig

posted by
**sejul** on
.

I have to retype this.

For which angles theta,

with 0 degrees less than/equal to theta less than/equal to 180 degrees, is sin 3theta = (equal) -1 (negative 1)?

a) 30 and 150 degrees

b) 60 and 120 degrees

c) 90 degrees

d) 0 and 120 degrees

How do I set this up?