Hello, skeske1234!

1. Angles and are in the Quadrant 1 so that:

a) Determine an exact value for

b) Determine an exact value for

c) Determine an exact value for

We're expected to know this identity: .

So we have: .

From in Quadrant 3, we have: .2. Angle is in the quadrant 3, and

a) Determine an exact value for

b) Determine an exact value for

a) We're expected to know that: .

So we have: .

b) We're expected to know that: .

So we have: .