# Male and Female functions

You are given two goniometric functions:

• Male: $g(\rho, \Theta) = \rho \, \cos\Theta \sin\Theta$
• Female: $f(\rho, \Theta) = \rho \, \cos^2\Theta$

Why are these two functions labeled "male" and "female"?

• Now explain me why the female's value at 90° is 0... – leoll2 Mar 22 '15 at 14:25
• @leoll2 that's a good point ahaha, it should actually be cos²(π-Θ) – Marco Bonelli Mar 22 '15 at 14:33

## 1 Answer

Maybe

cos = X-chromosome and
sin = Y-chromosome
Male = XY = cos * sin
Female = XX = cos * cos

• Also, you can mention the relation between the X coordinate and cos and the Y coordinate and sin. – dmg Mar 20 '15 at 10:52
• @dmg : It is X & Y 'chromosomes', you must have misread as 'coordinates' :) – rvd Mar 20 '15 at 13:06
• On the contrary, in the unit circle the cosine of the angle is equal to the displacement of X, the sine of the angle is the displacement of Y. That is why cos is X and sin is Y and not the other way around. – dmg Mar 20 '15 at 13:08
• Yeah, got your point. – rvd Mar 20 '15 at 13:12