Problem 44492. Approximate the cosine function

Solution 1562941

Submitted on 18 Jun 2018 by noam gridish

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Test	Status	Code Input and Output
1	Pass	filetext = fileread('myCos.m'); assert(isempty(strfind(filetext, 'regexp')),'regexp hacks are forbidden')
2	Pass	filetext = fileread('myCos.m'); trigUsed = any(strfind(filetext, 'cos')) \|\| any(strfind(filetext, 'sin')) \|\|... any(strfind(filetext, 'exp')); assert(~trigUsed, 'Cannot use MATLAB trigonometric functions')
3	Pass	x = 0; assert(abs(myCos(x)-cos(x)) < 0.0001) counter = 0
4	Pass	x = pi; assert(abs(myCos(x)-cos(x)) < 0.0001) counter = -4.9348 counter = 4.0587 counter = -1.3353 counter = 0.2353 counter = -0.0258 counter = 0.0019 counter = -1.0464e-04 counter = 4.3031e-06
5	Pass	x = pi/2; assert(abs(myCos(x)-cos(x)) < 0.0001) counter = -1.2337 counter = 0.2537 counter = -0.0209 counter = 9.1926e-04 counter = -2.5202e-05
6	Pass	x = 5*pi/3; assert(abs(myCos(x)-cos(x)) < 0.0001) counter = -13.7078 counter = 31.3172 counter = -28.6193 counter = 14.0110 counter = -4.2680 counter = 0.8864 counter = -0.1335 counter = 0.0153 counter = -0.0014 counter = 9.8593e-05

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