cmath.isclose(a, b, *, rel_tol=1e-09, abs_tol=0.0) Return True if the values a and b are close to each other and False otherwise. Whether or not two values are considered close is determined according to given absolute and relative tolerances. rel_tol is the relative tolerance – it is the maximum allowed difference between a and b, relative to the larger absolute value of a or b. For example, to set a tolerance of 5%, pass rel_tol=0.05. The default tolerance is 1e-09, which assures that the

cmath.exp(x) Return the exponential value e**x.

cmath.e The mathematical constant e, as a float.

cmath.cosh(x) Return the hyperbolic cosine of x.

cmath.cos(x) Return the cosine of x.

cmath.atanh(x) Return the inverse hyperbolic tangent of x. There are two branch cuts: One extends from 1 along the real axis to ∞, continuous from below. The other extends from -1 along the real axis to -∞, continuous from above.

cmath.atan(x) Return the arc tangent of x. There are two branch cuts: One extends from 1j along the imaginary axis to ∞j, continuous from the right. The other extends from -1j along the imaginary axis to -∞j, continuous from the left.

cmath.asinh(x) Return the inverse hyperbolic sine of x. There are two branch cuts: One extends from 1j along the imaginary axis to ∞j, continuous from the right. The other extends from -1j along the imaginary axis to -∞j, continuous from the left.

cmath.asin(x) Return the arc sine of x. This has the same branch cuts as acos().

cmath.acosh(x) Return the inverse hyperbolic cosine of x. There is one branch cut, extending left from 1 along the real axis to -∞, continuous from above.