x is the abscissa. find the absolute value of cosine of -x and the same value with changed sign.
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...
All your base are belong to us
Find the sum of the elements in the "second" diagonal
MATCH THE STRINGS (2 CHAR) very easy
construct matrix with identical rows
Given a matrix, return the last eigen value
Find the function 2
Distance of the centroids of the balls
subtract central cross
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