valarray cos() function in C++

The cos() function is defined in valarray header file. This function is used to calculate cosine of the value of each element in valarray and returns a valarray containing the cosine of all the elements. Syntax:

cos(varr);

Time Complexity: O(1)

Auxiliary Space: O(1)

Parameter: This function takes a mandatory parameter varr which represents valarray. Returns: This function returns a valarray containing the cosine of all the elements. Below programs illustrate the above function: Example 1:- 

The new valarray with manipulated values is : 
1 0.968912 0.877583 0.731689 0.540302

Example 2:-