HP 40G User Manual page 141

Graphing calculator
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ASIN
ACOS
ATAN
Using mathematical functions
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–1
Arc sine: sin
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).
–1
x. Output range is from 0° to 180°, 0 to π, or
Arc cosine: cos
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).
–1
Arc tangent: tan
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.
2
value
Example
2
18
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)
10-5

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