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Trig functions..

Ok, have a querry for you all...

Understanding that the Math.sin(number) method
requires its argument (number) to be in radian
form, and given that the relationship between a
degree and a radian is PI/180, then why doesn't
the following retunr the proper result?

sine  = Math.sin(D(Math.PI/180))

sine of the angle should be .8

The statement returns .866xxxx?
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