Trigonometric Functions - MySQL

The trigonometric functions are useful for calculating lengths, arcs, and angles, as well as plotting curves and performing complex calculations involving waves.

SIN(X): Sine of X

COS(X): Cosine of X

TAN(X): Tangent of X

COT(X): Cotangent of X

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NOTE  The secant and cosecant trigonometric functions (often written as sec and csc in mathematical notation) can be obtained in MySQL by using the expressions 1 / COS(X) and 1 / SIN(X) , respectively.

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The radian is a unit of angular measure defined such that 180 degrees is equal to p (pi) radians. (The number p is represented in MySQL as PI().) To convert radians to degrees, you can use the DEGREES() function, and to convert from degrees to radians, use the RADIANS() function.

The inverse trigonometric functions all return angle values expressed in radians:

ASIN(X): Arcsine of X

ACOS(X): Arccosine of X

ATAN(X): Arctangent of X

ATAN(X,  Y) or ATAN2(X,  Y): Arctangent of Y / X

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NOTE   MySQL stores p and e as double-precision floating-point values. This should be of sufficient accuracy for 99% of all applications requiring the use of these values.

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