5.3.72 _Q31acosByPI Function

This function finds the arc cosine of a Q31 value and then divides by PI (π).

Include

<libq.h>

Prototype

_Q31 _Q31acosByPI(_Q31 x);

Argument


`x`	a fixed-point number in Q31 format, which ranges from -2³¹ to 2³¹-1. The value of this argument ranges from -2147483648 to 2147483647.

Return Value

This function returns the arc cosine of x, divided by PI, in Q31 format. The value ranges from 20860 to 2147483647.