Math trigonometric functions
- math.acos()
- math.acosh()
- math.asin()
- math.asinh()
- math.atan()
- math.atan2()
- math.atanh()
- math.cos()
- math.cosh()
- math.sin()
- math.sinh()
- math.sqrt()
- math.tan()
- math.tanh()
math.tan()
Computes the tangent of its argument x, measured in radians.
Parameters
x - Floating point value representing an angle in radians.
Return Value
Upon successful completion, this function returns the tangent of x.
If x is math.NAN, a NaN will be returned.
If x is ±0, x will be returned.
If x is math.POS_INFINITY or math.NEG_INFINITY, a domain error occurs and a NaN will be returned.
If x is subnormal, a range error occurs and x will be returned.
If the result would cause an overflow, a range error occurs and math.tan() will return math.POS_HUGE_VAL or math.NEG_HUGE_VAL, with the same sign as the result of the function.
Errors
- If the x argument is
math.POS_INFINITYormath.NEG_INFINITY, thenfastly.errorwill be set toEDOM. - If the x argument is subnormal or if the result overflows, then
fastly.errorwill be set toERANGE.
Format
FLOAT
math.tan(FLOAT x)
Examples
1
2
3
declare local var.fo FLOAT;
set var.fo = math.tan(math.PI_4);