d/dx[ tan-1(x) ] = 1/(1 + x2)
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Integration for inverse tangent of square x
It is a function which maps the tangent ratio - any real value - to an angle in the range (-pi/2, pi/2) radians. Or (-90, 90) degrees.If tan(x) = y then x is the inverse tangent of y.It is also known as "arc tangent", and spreadsheets, such as Excel, use "atan" for this function.Warning:1/tangent = cotangent is the reciprocal, NOT the inverse.
-ln|cos x| + C
inverse tangent of 0.5 is 26.565 deg
Yes, the derivative of an equation is the slope of a line tangent to the graph.