Manuals/calci/DSEC

DSEC(Number)

Number is the angle in Degrees.
- DSEC(),returns the double-precision secant of the given angle

SEC can be used if the angle is in Radians.
The angle can be a single value or any complex array of values.
For example DSEC(1..100) can give an array of the results, which is the SECANT value for each of the elements in the array. The array could be of any values either '+' or '-' like 1..5@DSEC or (-5)..(-1)@DSEC.

Description

This function is used to obtain the Secant value of any Number in degrees.
It is the reciprocal of COS function i.e, SEC(x) = 1 / COS(x).Here x is any Number.
In a right angled triangle SEC(x) = Hypotenuse / Adjacent side.
To obtain the value in Radians multiply with PI()/180 or use SEC function SEC(x)
DSEC returns NaN if 'x' is not real

The following example shows how DSEC is applied to an array of numbers containing angles 1..10.