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**100sin(alpha) = 500cos(alpha) ---- how do you solve such a thing?**

100sin(alpha) = 500cos(alpha)

I see there's only one unknown, but I'm a little befuddled how to approach trigo equations like that when the angle is unkown (I know about the arc-cos/sin/tan function) but there are 2 functions in the equation! Cosine AND Sine! Arg... perhaps you guys can help me with a short guide/link/whatever...

I'll appreciate the help :)

-Dory