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Re: Request for simple trig formula
From: Peter Fogg
Date: 2003 Apr 16, 11:22 +1000
From: Peter Fogg
Date: 2003 Apr 16, 11:22 +1000
----- Original Message ----- From: "David Weilacher" > I don't recall the simple trig formulas and don't have the mental where-with-all to find anything using a search engine. I think it is because my mind just doesn't index the way they do. > > If I know the lengths of 3 sides of a triangle and one angle (90), how do I determine the two remaining angles. > > What I would like to come away with are the side-angle-side, angle-side-angle, and side-side-side formulas so that I can write them down in my address book for future reference. Rather than the internet I would suggest the local library, and a high school maths textbook which explains trigonometry. I won't try to rewrite one of these, other than to suggest that the basic formulae are summed up in the politically incorrect mnemonic SOH CAH TOA (Some Old Hags Can Always Hide Their Old Age) where sine = opposite/hypotenuse cosine = adjacent/hypotenuse tangent=opposite/adjacent
