3*cos(x)/(y*cos(x)+1.5/y*sqrt(y-1.5^2*sin(x)^2)) x from 0 to pi/2 y from 1.5 to 2

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.