ATAN()
Arcus tangent of the argument
- Syntax
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- ACOS (nTangent) -> nRadiant
- Arguments
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- <nTangent> the tangent of an angle
- Returns
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- <nRadiant> the angle whose tangent is <nTangent>
- Description
-
- The function ATAN() is the inverse function of TAN(). It takes a tangent value and returns the smallest(!) angle whose tangent equals to the argument. The return value is given in radiants between -PI()/2 and PI()/2 (full angle equals 2*Pi - see DTOR() if you need to convert it into degress).
Examples
? atan (0.0) --> 0.0
? atan (0.5) --> 0.4636...
Tests
atan (0.0) == 0.0
atan (1.0) == PI()/4
atan (0.0) == 0.0 // and not PI(), although tan (PI()) == 0.0 !
- Status
- Ready
- Compliance
-
- ATAN() is compatible with CT3's ATAN().
- Platforms
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- All
- Files
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- Source is trig.c, library is libct.
- See Also