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...
Filter AC, pass DC
Matrix indexing with two vectors of indices
What's Your BMI?
Vector of numbers divisible by 3
06 - Matrix Equations 3
Distance of the centroids of the balls
Fermat's Last Theorem - Fermat's conjecture
frame of the matrix
Find the function 2
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