Finding the Arcsine of X

[Coolmo]

Is it just me? How on earth do you find the Arcsine of a number to come up with an angle?

On a graph I have a length X, length Y and their hypotenuse Z. I now need to find the angle produced opposite of the Y value. It's easy right?

Yangle = Arcsine(Y/Z)

...but how do I do this in VBA!!?? They give you the Sin, Cos, and Tan functions and even the Atn (arctangent) function but I can't find the Arcsine function. Can anyone tell me how to find this angle? Thanks for any help on this.

[buzz]

Try this:

ArcSin(x) = Atn(x / Sqr(-x * x + 1))

-Buzz

[rken.laws]

I had the same problem a few years ago. I don't believe I found anything for Arcsine but ATAN is a function. I think I used it and worked backwards.

[Coolmo]

Yeah... duh.. I guess I should have realized that I could have just plugged in the X and Y values in a different way to utilize Arctan instead of using Arcsine. Thanks for the quick responses. I wonder why "they" chose to leave out the other two functions?

[amigost]

You can use "atan,asin,acos"
enoy it