Mwnci atan() Function

Syntax

atan(tangent)

Parameter

Parameter

Definition
tangent tangent argument
– ∞ ≤ tangent ≤ ∞

Description

The atan() function returns the arctangent of tangent, that is, the length in radians of the arc whose tangent is tangent.

Example

The following example uses atan() to verify the trigonometric identity:

print("Arcsine(Arctangent) Identity Verification\\n")
print(" tan() Expected Returned\n")
print("--------- --------- ---------\n")
tangent = -1.5
while (tangent <= 1.5){
expect = tangent / sqrt(1 + pow(tangent,2))
printf("%+8.6f %+8.6f %+8.6f\n",tangent,expect,sin(atan(tangent)))
tangent = tangent + 0.1
}