i dont know maybe you should be smart and ask your service provider
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Sin is the opposite over the hypotenuse.
-- sin(x) is a number. It's the sine of the angle 'x'. -- sin-1(x) is an angle. It's the angle whose sine is the number 'x'.
sin(0)=0 and sin(very large number) is approximately equal to that same very large number.
Sin is sin-1(opposite/hypotonose)
if you have a graphing calculator you can use the inverse of Sin( and enter the number of the sides EX. push second then Sin then enter the long leg number divided by the hypotenuse and then push enter (note. this only works on right triangles)