Sigh! There should really be some quality control on Cody, to save us from stupid problems like this...
The third element of aVec in the the image contained within your problem description does not match the third element of aVec used in the test suite.
Back and Forth Rows
CONVERT TAN TO SIN
multiply by three
Back to Basics - Find no. of elements in a matrix?
04 - Scalar Equations 1
03 - Matrix Variables 2
03 - Matrix Variables 6
07 - Common functions and indexing 6
07 - Common functions and indexing 5
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