The <QtMath> header file provides various math functions.

These functions are partly convenience definitions for basic math operations not available in the C or Standard Template Libraries.

The header also ensures some constants specified in POSIX, but not present in C++ standards (so absent from <math.h> on some platforms), are defined:

Returns the arccosine of v as an angle in radians. Arccosine is the inverse operation of cosine.

See also

qAtan() qAsin() qCos()

Returns the arcsine of v as an angle in radians. Arcsine is the inverse operation of sine.

See also

qSin() qAtan() qAcos()

Returns the arctangent of v as an angle in radians. Arctangent is the inverse operation of tangent.

See also

qTan() qAcos() qAsin()

Returns the arctangent of a point specified by the coordinates y and x. This function will return the angle (argument) of that point.

See also

qAtan()

Returns the cosine of an angle v in radians.

See also

qSin() qTan()

This function converts the degrees in float to radians.

Example:

float degrees = 180.0f
float radians = qDegreesToRadians(degrees)

See also

qRadiansToDegrees()

Returns the exponential function of e to the power of v.

See also

qLn()

Returns the absolute value of v.

Returns the natural logarithm of v. Natural logarithm uses base e.

See also

qExp()

This function returns the nearest power of two greater than value. For 0 it returns 1, and for values larger than or equal to 2^31 it returns 0.

Returns the value of x raised to the power of y. That is, x is the base and y is the exponent.

See also

qSqrt()

This function converts the radians in float to degrees.

Example:

float radians = float(M_PI)
float degrees = qRadiansToDegrees(radians)

See also

qDegreesToRadians()

Returns the sine of the angle v in radians.

See also

qCos() qTan()

Returns the square root of v. This function returns a NaN if v is a negative number.

See also

qPow()

Returns the tangent of an angle v in radians.

See also

qSin() qCos()