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...
Find all elements less than 0 or greater than 10 and replace them with NaN
Back to basics 18 - justification
Duplicate each element of a vector.
Number of digits in an integer
04 - Scalar Equations 2
Inverse of Hilbert matrix
Center of mass
Given a matrix, return the last eigen value
Distance of the centroids of the balls
Find the function
Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
You can also select a web site from the following list:
Select the China site (in Chinese or English) for best site performance. Other MathWorks country sites are not optimized for visits from your location.
Contact your local office