Calculates the secant of any expression.
SEC(val)
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val |
- |
A scalar, series or table. |
A scalar, series, or table.
sec(-2*pi..pi/100..2*pi);gridhv;griddot;sety(-10, 10)
displays the secant from -2π to 2π.
sec(pi)
returns -1.
sec(-2..0.1..2)
returns a 41 point series.
The secant is defined as:
for all complex z.
The function calculates in radians unless degrees are specified with the SETDEGREE function.
At or near ((2N + 1) / 2) π radians, or (2N + 1) 90 degrees, where N is any large integer, this function returns very large results or math errors.