trigonometry

I need to know how to (function name maybe) find the angle of a corner of a right triangle from the length of the 3 sides of a it.<

I do know how to do this with a calculator, I jsut don't know what it does, or what's its called in vb. (I tihnk what I'm looking for is like a... 'unsin' (sin(a) = 3 unsin(3) = a))

I haven't used VB much lately, but I found this under Derived Math Functions when I searched for "arcsin":

Inverse Sine
Arcsin(X) = Atn(X / Sqr(-X * X + 1))

I belive that there is a sin-1 function in VB (don't know the exact name). It would be faster then using such a complex forumal (as sin-1 would be written in assembly). If you have MSDN, look up sin, and see what they have under the related. I would check, except that I am at school (and they are so cheap that they only have VB in one lab, and no MSDN).

There is no sin-1 function, that complex function you see is MSDN's answer.

inverse Tan is atn, however, and is the only one that exists

Answered here http://www.vbforums.com/showthread.p...hreadid=170178