## 3.9 Trigonometric functions

real hypot(real x, real y)
Return the length of the hypotenuse of a right triangle with sides of length x and y. $\begin{equation*} \text{hypot}(x,y) = \begin{cases} \sqrt{x^2+y^2} & \text{if } x,y\geq 0 \\ \textrm{NaN} & \text{otherwise} \end{cases} \end{equation*}$
Available since 2.0

R hypot(T1 x, T2 y)
Vectorized implementation of the hypot function
Available since 2.25

R cos(T x)
The cosine of the angle x (in radians)
Available since 2.0, vectorized in 2.13

R sin(T x)
The sine of the angle x (in radians)
Available since 2.0, vectorized in 2.13

R tan(T x)
The tangent of the angle x (in radians)
Available since 2.0, vectorized in 2.13

R acos(T x)
The principal arc (inverse) cosine (in radians) of x
Available since 2.0, vectorized in 2.13

R asin(T x)
The principal arc (inverse) sine (in radians) of x
Available since 2.0

R atan(T x)
The principal arc (inverse) tangent (in radians) of x, with values from $$-\pi/2$$ to $$\pi/2$$
Available since 2.0, vectorized in 2.13

R atan2(T y, T x)
Return the principal arc (inverse) tangent (in radians) of y divided by x, $\begin{equation*} \text{atan2}(y, x) = \arctan\left(\frac{y}{x}\right) \end{equation*}$
Available since 2.0, vectorized in 2.34