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...
Project Euler: Problem 1, Multiples of 3 and 5
Find the largest value in the 3D matrix
Find nearest prime number less than input number
Find the logic
Multiply by 3
frame of the matrix
subtract central cross
Inverse of Hilbert matrix
Given a matrix, return the last eigen value
Find the function
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