HP 39g hp 39g & 40g_user's manual_English_E_pdfbpia5212.pdf - Page 141

Asin1, Acos1, Atan1

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ASIN ACOS ATAN √ Arc sine: sin-1x. 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). Arc cosine: cos-1x. 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 -1 ≤ x ≤ 1 . ACOS(value) Example ACOS(1) returns 0 (Degrees mode). Arc tangent: tan-1x. 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. value2 Example 182 returns 324 Square root. Also accepts complex numbers. √value Example 324 returns 18 Negation. Also accepts complex numbers. -value Example -(1,2) returns (-1,-2) Using mathematical functions 10-5

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Using mathematical functions
10-5
>6+,)7@
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).
>6+,)7@
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).
>[
²
@
Square. Also accepts complex numbers.
value
2
Example
18
2
returns
324
>6+,)7@
√
Square root. Also accepts complex numbers.
√
value
Example
returns
18
>³²´@
Negation. Also accepts complex numbers.
–
value
Example
-(1,2)
returns
(-1,-2)
1
–
x
1
≤
≤
324