# vvcosisinf(_:_:_:) Calculates the cosine and sine of each element in an array of single-precision values. ``` func vvcosisinf(_: OpaquePointer, _: UnsafePointer, _: UnsafePointer) ``` ## Discussion ### Parameters: - parameter 1: The output array, *y*. - parameter 2: The input array, *x*. - parameter 3: The number of elements in the arrays. This function calculates the complex number on the unit circle corresponding to the angle given by each element of a vector. The following code shows an example of using [`vvcosisinf(_:_:_:)`](/documentation/Accelerate/vvcosisinf(_:_:_:)). ```objc #include float x[] = {-M_PI_2, 0, M_PI_2}; complex float y[3]; int n = 3; vvcosisinf(y, x, &n); ``` On return, for each array element in `y`, `real` is the cosine of `x` and `imag` is the sine of x. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)