asin()

Returns the arc sine in the radian measure.

Synopsis

float asin(float x);

Parameters

Parameter Description
x angle

Return Value

Returns the arc sine in the radian measure.

If the argument is lying outside of the value range [-1..+1], NaN (Not a Number) is returned.

Description

Returns the arc sine between -Pi/2 and Pi/2 in the radian measure. x may be from -1 to 1, in the event of an error 0.0 is returned.

Example

main()
{
  float pi = 3.141592,f;
  f = sin(pi/2);
// results in 1
  f = asin(1);
// results in PI/2
  f = sinh(0.2);
//results in 0.201336
}

Assignment

Mathematical functions

Availability

CTRL