JavaScript Arithmetic (Math) Trigonometry
Example
All angles below are in radians. An angle r in radians has measure 180 * r / Math.PI in degrees.
Sine
Math.sin(r);
This will return the sine of r, a value between -1 and 1.
Math.asin(r);
This will return the arcsine (the reverse of the sine) of r.
Math.asinh(r)
This will return the hyperbolic arcsine of r.
Cosine
Math.cos(r);
This will return the cosine of r, a value between -1 and 1
Math.acos(r);
This will return the arccosine (the reverse of the cosine) of r.
Math.acosh(r);
This will return the hyperbolic arccosine of r.
Tangent
Math.tan(r);
This will return the tangent of r.
Math.atan(r);
This will return the arctangent (the reverse of the tangent) of r. Note that it will return an angle in radians between -π/2 and π/2.
Math.atanh(r);
This will return the hyperbolic arctangent of r.
Math.atan2(x, y);
This will return the value of an angle from (0, 0) to (x, y) in radians. It will return a value between -π and π, not including π.
