- 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_INFINITY
ormath.NEG_INFINITY
, thenfastly.error
will be set toEDOM
. - If the x argument is subnormal or if the result overflows, then
fastly.error
will 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);