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

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.