Value of angle theta

I'm trying to find the value of an angle (theta) given the values of cosine (cos(theta)) and sine (sin(theta)). However, when I use the inverse trigonometric functions acosd(cos(theta)) and asind(sin(theta)), I end up with two different values for theta. How should I handle this situation?

Answer 1

[Samay Sagar]

This can be happening for negative values of theta since the range of arcsin is [-pi/2,pi2] and that of arccos is [0,pi] . You can try to first calculate tan(theta) and then calculate arctan. Something like this might help:

a = sin(x)
b = cos(y)
c = tan(y)
d = atand(c) % or use atan2d as d = atan2d(sin(x),cos(x))