cospi

Computes cos(X * pi) accurately.

📝Syntax

res = cospi(x)

📥Input Arguments

Parameter	Description
x	a numeric value

📤Output Arguments

Parameter	Description
res	a numeric value

📄Description

res = cospi(x) computes cos(x * pi) accurately.

For integers, cospi(x) is +1 or -1.

For odd integers, cospi(x / 2) is exactly zero.

💡Examples

x = [0, 1/2, 1, 3/2, 2];
r = cos(x * pi)
res = cospi(x)

🔗See Also

🕔Version History

Version	Description
1.0.0	initial version