Help with math trigonometric equation?

Question

[ cos⁡(3π/2+θ) - cos(π+θ) ] / [ sin⁡ (π-θ) -sin(3π+θ) ]

Answer 1

[ cos⁡(3π/2 + θ) - cos(π + θ) ] / [ sin⁡ (π - θ) - sin(3π + θ) ]

= 1/2 csc(θ) (sin(θ) + cos(θ))

Source(s): https://www.wolframalpha.com/input/?i=%5B+cos%E2%8...