Hello everyone! I am stuck in my research with a probability density function problem.. I have 'Alpha' which is a random variable from 0-180. Alpha has a uniform pdf equal to 1/180. Now, 'Phi' is a function of 'Alpha' and the relation is given by, Phi = (-0.000001274370471*Alpha^4) + (0.000393888213304*Alpha^3) - (0.037767210716686*Alpha^2) + (1.66089231837634*Alpha) - 5.83257204679921 I am trying to find the PDF of 'Alpha' but having a hard time in doing that.. Any help will be greatly appreciated! Thanks.