HP 39g+ - Manual (Page 141)

Using mathematical functions 10-5
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ASIN Arc sine: sin
–1
x. Output range is from –90° to 90°, –
π
/2 to
π
/2, or –100 to 100 grads. Inputs and outputs depend on the
current angle format. Also accepts complex numbers.
ASIN (value)
Example
ASIN(1) returns 90 (Degrees mode).
>6+,)7@
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).
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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
>6+,)7@ √
Square root. Also accepts complex numbers.
√
value
Example
returns 18
>  @
Negation. Also accepts complex numbers.
–value
Example
-(1,2) returns (-1,-2)
1 – x 1
≤ ≤
324