plot inverse of tan function i.e ratio of sine and cosine

Hi ! If i have sine and cosine function / signals then ratio of both is ' tan'. Now, how can I plot the inverse of these values ? tan (theta) = sin(theta)/ cos (theta), so how 'theta = inverse of tan (sin / cos )' can be plotted ?

Answer 1

[Wayne King]

You can use atan() or see atan2()