HP 40gs User Manual page 159

hp40g+.book Page 5 Friday, December 9, 2005 1:03 AM
ACOS
ATAN
Using mathematical functions
Example
ASIN(1) returns 90 (Degrees mode).
–1
Arc cosine: cos 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
≤ ≤
1 – x 1
COS domain of
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)
Power (x raised to y). Also accepts complex numbers.
value^power
.
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