https://docs.vultr.com/clang/s....tandard-library/math

math.h atan2 In C, the atan2(y, x) function from math.h computes the arc tangent of y/x, considering the signs of both arguments to determine the correct quadrant.

In Java, you can use Math.atan2(y, x), which works the same way. It returns the angle in radians between the positive x-axis and the point (x, y).

 

docs.vultr.com

C math.h atan() - Arc Tangent Calculation | Vultr Docs

https://docs.vultr.com/clang/s....tandard-library/math


acosh In Java, the Math.acosh() method computes the inverse hyperbolic cosine (arcosh) of a given number. It is available in Java 8 and later and requires the input x ≥ 1, as the function is undefined for values less than 1.