Find the values of the six trigonometric functions evaluated at θ if the following conditions hold: cos(2𝜃)=3/8 and 90∘≤𝜃≤180∘

Answer 1

cos 2θ = 2 cos² θ - 1

3/8 = 2 cos² θ - 1

11/8 = 2 cos² θ

11/16 = cos² θ

√11 / 4 = cos θ

√5 / 4 = sin θ

From here can to derive the values of the other four functions?