Problem 43209. Create cosine function out of sine

Solution 1464129

Submitted on 16 Mar 2018 by J. S. Kowontan
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Test Suite

Test Status Code Input and Output
1   Pass
filetext = fileread('COS.m'); assert(isempty(strfind(filetext, 'cos')),'cos() forbidden')

2   Pass
x = 0; y_correct = 1; assert(abs(COS(x)-y_correct)<0.01)

3   Pass
x = pi/2; y_correct = 0; assert(abs(COS(x)-y_correct)<0.01)

4   Pass
x = pi; y_correct = -1; assert(abs(COS(x)-y_correct)<0.01)

5   Pass
x = 3*pi/2; y_correct = 0; assert(abs(COS(x)-y_correct)<0.01)

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