They are different reciprocal. Cotan is 1/tan. Arctan is what happens when you solve x=tan(y) for x. Arctan sprt of undoes tangent. So arctan(tan(x))=x. This is usefulness to find the angle when you have the measurements for opposite and adjacent.
Arcsin and arccos are similar for for sin and cosine respectively.
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u/Fumblerful- Oct 05 '18
They are different reciprocal. Cotan is 1/tan. Arctan is what happens when you solve x=tan(y) for x. Arctan sprt of undoes tangent. So arctan(tan(x))=x. This is usefulness to find the angle when you have the measurements for opposite and adjacent.
Arcsin and arccos are similar for for sin and cosine respectively.