Newton-Rhapson Method in Matlab

Hi all,

I have 2 functions:

f1=15*cos(q)+50*cos(x)-45*cos(y)-40

f2=15*sin(q)+50*sin(x)-45*sin(y)

I have to plot q versus x and q versus y.

q is in interval of [0,2pi] and the delta q is 2.5 degrees.

How should I define q?