Please, don't use cos, tan, cot matlab functions.
As per Solution 1043996, need to ban a couple of other functions to enforce instruction.
This is wrong. For example, x = 3*pi/4, cot(x) = -1; but this solution gives sqrt(1-sin(x)^2)/sin(x) = 1.
05 - Vector Equations 1
Find the area of the four walls
Append two matrix as shown below example
Finding perimeter of a rectangle
find the surface area of a cube
Check if a string starts with another string
Return ! if array element starts with a certain letter. Otherwise return ?
Return the amount of palindromes (words) in the string.
Find the sum of the negative elements under the main diagonal.
Find the product of the positive elements above the main diagonal.
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