The “cos” Function in R

• Package: Base R (No specific package, it’s a built-in function)

• Purpose: To compute the cosine of a numeric vector, interpreting the input as angles in radians.

• General Class: Mathematical Computation

• Required Argument(s):

• x: A numeric vector representing angles in radians for which the cosine is to be computed.

• Notable Optional Arguments:

• None

• Example:

• # Example usage
  angles_in_radians <- c(0, pi/2, pi, 3*pi/2, 2*pi)
  
  # Compute the cosine
  cos_values <- cos(angles_in_radians)
  
  print(cos_values)

• In this example, cos is a built-in function in base R, and it is used to compute the cosine of a numeric vector representing angles in radians. The x argument is the required numeric vector for which the cosine is calculated. There are no notable optional arguments for this function. The result is a numeric vector where each element represents the cosine of the corresponding angle in the input vector.