HP 40gs - Manual (Page 159)

Using mathematical functions 13-5
Example
ASIN(1) returns 90 (Degrees mode).
ACOS Arc cosine: cos –1 x. Output range is from 0° to 180°, 0 to
π, or 0 to 200 grads. Inputs and outputs depend on the
current angle format. Also accepts complex numbers.
Output will be complex for values outside the normal
COS domain of
.
ACOS(value)
Example
ACOS(1) returns 0 (Degrees mode).
ATAN Arc tangent: tan –1 x. Output range is from –90° to 90°,
2π/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
1 – x 1 ≤ ≤
324
hp40g+.book Page 5 Friday, December 9, 2005 1:03 AM