5.3.83 _Q31cosPI Function

This function finds the cosine of PI (π) times a Q31 value.

Include

<libq.h>

Prototype

_Q31 _Q31cosPI(_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 cosine of PI times x in Q31 format. The value ranges from -2147483648 to 2147483647.