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?
The test description has been updated. Also, new and improved test suites are added within the scope of the problem.
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...
Who knows the last digit of pi?
Matrix indexing with two vectors of indices
Basics: 'Find the eigenvalues of given matrix
Find out missing number from a vector of 9 elements
Max of a Vector
Find the function
Find the function 2
Fermat's Last Theorem - Fermat's conjecture
Inverse of Hilbert matrix
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