Inverse Trigonometric Functions

asin(z) acos(z) atan(z)
asec(z) acsc(z) acot(z)

Return the value in radians of the arcsine, arccosine, arctangent, arcsecant, arccosecant, and arccotangent, respectively, that is, the angle whose sin, cos, and so on, is z.

Arguments:

• z is a dimensionless complex scalar.

Notes:

• Values returned are from the principal branch of these functions.

• The atan function is related to polar angles.
• The result returned from acot is between 0 and pi if z is real, and the principal value if z is complex.