Map and Table Calculation

ACOS( ) function

Returns the arc cosine, i.e. the inverse cosine (cos-1), of a value.

Syntax

ACOS(Value)

Input

Value is a value
Domain type: any Value domain
Value range: [-1,1]

Output

ACOS returns: a real value in radians
Domain: system domain Value
Value range: [0,p]

Notes:

Tip:

When the definition symbol = is used, a dependent output map or dependent output column is created; when the assignment symbol := is used, the dependency link is immediately broken after the output map/column has been calculated.

Usable in

MapCalc, TabCalc, Simple calculators

Examples

Pocket line calculator examples:

? ACOS(0.3)

returns 1.266

MapCalc example:

OutMap = ACOS(InMap)

 

InMap1

OutMap1

2.0 1.0 0.5
0.2 0.3 -1.0
? -0.4 -0.1
? 0.000 1.047
1.369 1.266 3.142
? 1.982 1.671

 

OutMap2 = RADDEG(ACOS(InMap2))

 

InMap2

OutMap2

0.000 0.500 0.707
0.866 1.000 -1.000
-1.000 -0.707 ?
90 60 45
30 0 180
270 315 ?

TabCalc example:

OutCol1 = ACOS(InCol1)

OutCol2 = RADDEG(ACOS(InCol2))

 

InCol1

OutCol

InCol2

OutCol2

2.0

?

0.000

0

1.0

0.000

0.500

30

0.5

1.047

0.707

45

0.2

1.369

0.866

60

0.3

1.266

1.000

90

-1.0

3.142

????

180

?

?

-1.000

270

-0.4

1.982

-0.707

315

-0.1

1.671

?

?

See also: