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t = any number.
It is considered to be the tangent of an angle. |
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ATan( t ) is an angle which has tangent = t.
It is in the range -90 to +90 degrees. See also ATan2 for an extended version with 360 degree range. |
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; ATan example
Const width = 640, height = 480 Graphics width, height Local T#, AT# ; Tan and ATan zero# = 0 Print " T ATan( T )" Print "=======================" ; First, an extreme case... T# = 1 / zero ; +Infinity AT = ATan( T ) Print RSet(T, 10) + RSet( AT, 11) ; Now, back to normal usage... For n = -10 To 10 T = Sgn( n ) * n * n AT = ATan( T ) Print RSet(T, 10) + RSet( AT, 11) Next ; Finally, another extreme case. T# = -1 / zero ; -Infinity AT = ATan( T ) Print RSet(T, 10) + RSet( AT, 11) WaitKey() : End |