In addition to the weak test suite: The title of the problem says "Sinus function", yet the (incomplete) problem description mentions only "cosine" ??? Furthermore, should abs(cos(-x)) be assigned to y, or to z?
Please improve the test cases. Returning 1 and -1 is complete enough with these sloppy tests.
bad test suite
The test suite is not very rigorous...
1914 Solvers
It dseon't mettar waht oedrr the lrettes in a wrod are.
666 Solvers
Project Euler: Problem 8, Find largest product in a large string of numbers
330 Solvers
Who knows the last digit of pi?
561 Solvers
Given a matrix, swap the 2nd & 3rd columns
535 Solvers
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