Preview question: Use identities to write each expression as a function of θ.cos (θ + 90°)

Behaviour being used: Adaptive mode

Minimum fraction: 0

Question summary: Use identities to write each expression as a function of θ. cos (θ + 90°): -cos θ; -sin θ; sin θ; cos θ

Right answer summary: -sin θ

Question state: todo