HP 40G manual +,7@ASIN, +,7@ACOS, +,7@ATAN, +,7@√

>6+,)7@ASIN	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).
>6+,)7@ACOS	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).
>6+,)7@ATAN	Arc tangent: tan–1x. 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.
	value2
	Example
	182 returns 324
>6+,)7@√	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