Question

find sin theta given that cos2 theta =3/5, 3pi/2 <2theta <2pi

Answer 1

Now you have sin^2 theta = 1/5, solve for sin theta, given that theta lies in the 4th quadrant (which means sin is negative there).

Answer 2

so i squre 1/5?

Answer 3

or is 1/5 the answer?

Answer 4

- sqrt(1/5) or - sqrt(5)/5

Answer 5

sin is negative in 4th quadrant.

Answer 6

is that how i would answer?