Question

How do you find the two quadrants that `theta` could terminate given `sintheta=3/5`?

Answer 1

First and second quadrant

Explanation:

using the CAST rule.
The CAST rule tells you which function is positive in each quadrant. And the c, a, s and t stand for cosine, all, sine and tangent respectively.

creds: www.physics.uoguelph.ca