asin

Arc sine

Description

float asin ( float $arg )

Returns the arc sine of arg in radians. asin is the complementary function of sin, which means that a==sin(asin(a)) for every value of a that is within asin's range.

Parameters

arg

The argument to process

Return Values

The arc sine of arg in radians

See Also

  • sin
  • asinh
  • acos
  • atan