Asin()

asin(<number>[, <units>])

Returns the arcsine of <number>. The value returned will be expressed in <units>.

<units> may be 'radians', 'degrees', or 'gradians' or just the first letter of any of these. By default, <units> is 'radians'.

In a circle, there are 2*pi() radians, 360 degrees, and 400 gradians.

Example

> say asin(0)

You say, "0"

> say asin(1)

You say, "1.5707963267948966"

> say asin(fdiv(sqrt(2),2),d)

You say, "45"

> say asin(0.5,d)

You say, "30"

Related Topics

acos(), atan(), ctu(), cos(), pi(), sin(), tan()