Which expression is equivalent to cos(90∘−θ)\cos(90^\circ - \theta)cos(90∘−θ)?
cos(θ)\cos(\theta)cos(θ)
sin(θ)\sin(\theta)sin(θ)
−cos(θ)-\cos(\theta)−cos(θ)
−sin(θ)-\sin(\theta)−sin(θ)