1 Trigonometry functions
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4 sin ( a -- result ) return sinus from given angle "a",
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5 360ø is 2000. So 1000 represents 180ø angle.
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6 Result will be in range -10'000 to 10'000, instead of ñ1.
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8 cos ( a -- result ) return cosinus from given angle.
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9 Parameters are like in "sin" function.
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