C atan()

C atan() Prototype

double atan(double x);

Function atan() takes a single double argument and returns the value in radians.

The returned value of atan() is of type double.

For a Better Understanding of atan():

[Mathematics] tan-1x = atan(x) [In C programming]

It is defined in <math.h> header file.

The library function atan() can take any value from negative to positive.

Output

Inverse of tan(1.00) = 0.79 in radians
Inverse of tan(1.00) = 45.00 in degrees

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