HP 39g+ - Manual (Page 149)

Using mathematical functions 11-5
ATAN Arc tangent: tan
–1
x. Output range is from –90° to 90°,
2 π/2 to π/2, or –100 to 100 grads. Inputs and outputs
depend on the current angle format. Also accepts
complex numbers.
ATAN (value)
Example
ATAN(1) returns 45 (Degrees mode).
Square. Also accepts complex numbers.
value
2
Example
18
2 returns 324
Square root. Also accepts complex numbers.
value
Example
returns 18
Negation. Also accepts complex numbers.
–value
Example
-(1,2) returns (-1,-2)
Power (x raised to y). Also accepts complex numbers.
value^power
Example
2^8 returns 256
ABS Absolute value. For a complex number, this is .
ABS (value)
ABS ((x,y))
Example
ABS(–1 ) returns 1
ABS((1,2)) returns 2.2360679775
324
x
2
y
2
+