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.
The Goldbach Conjecture
Multiply 2 numbers
Swap two numbers
Solve expression II
Find hen's weight.
Find the sum of the negative elements under the main diagonal.
Return ! if array element starts with a certain letter. Otherwise return ?
Return the length of the longest word in the string.
Find the Sum of the Series:
Solve the system of equations.
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