Problem 43212. Create tangent function out of cosine only

Solution 1818905

Submitted on 17 May 2019 by Jean-Marie Sainthillier

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Test	Status	Code Input and Output
1	Pass	filetext = fileread('TANGENT.m'); assert(isempty(strfind(filetext, 'tan')),'tan() forbidden') assert(isempty(strfind(filetext, 'sin')),'sin() forbidden')
2	Pass	x = 0; y_correct = 0; assert(abs(TANGENT(x)-y_correct)<0.01) ans = 0
3	Pass	x = pi/4; y_correct = 1; assert(abs(TANGENT(x)-y_correct)<0.01) ans = 1.0000
4	Pass	x = -pi/4; y_correct = -1; assert(abs(TANGENT(x)-y_correct)<0.01) ans = -1.0000