Re: need help on a geom formula

To: CALC-TI@LISTS.PPP.TI.COM
Subject: Re: need help on a geom formula
From: Dawson Wong <dawsonwong@JUNO.COM>
Date: Wed, 1 Apr 1998 20:17:31 -0600
References: <1nyU.17$YU3.80492@katana>
Reply-To: Dawson Wong <dawsonwong@JUNO.COM>
Xref: paladin.american.edu bit.listserv.calc-ti:22101

I found this formula in my Precalculus book.

Given two nonperpendicular lines with slopes m1 and m2, the angle between
the two lines is given by

                  m2-m1
arctan(abs(------------))
                1+m1m2
Scott Wolf wrote in message <1nyU.17$YU3.80492@katana>...
>Does anyone know the formula for finding the measurement of an angle when
>the slope of the two lines is known. I know it has something to do with
>sin^-1 but my math teacher can't figure out.
>
>Thanks in advance.
>Scott Wolf
>
>

References:

need help on a geom formula

From: Scott Wolf <scottwolf@USA.NET>

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