Re: Ti 85 question

To: CALC-TI@LISTS.PPP.TI.COM
Subject: Re: Ti 85 question
From: Jemfinch02 <jemfinch02@AOL.COM>
Date: Fri, 16 Apr 1999 04:37:20 GMT
Organization: AOL http://www.aol.com
References: <371684fc@news.velocity.net>
Reply-To: Jemfinch02 <jemfinch02@AOL.COM>
Xref: paladin.american.edu bit.listserv.calc-ti:28664

>When an 85 does (sin ^-1) on a number > 1 it gives (1.57079632679, and a
>negative number)
>
>Am I correct to assume that there should not be a sin of a number > 1,
>because that angle shouldn't exist?  Or am I missing something somewhere.

On a complex plane, the angle does exist.  It's just complex.  Your TI-85
understands this, and since it can handle complex numbers, it gives you the
sign of this complex angle.

The sin(x) function is merely a special taylor series.  Taylor series' can work
with both real and complex numbers, and since the 85 handles them, it will
compute the equivalent taylor series for a complex number.

Hope it helps,
Jeremy

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References:

Ti 85 question

From: Dale <d_a_l_e_@HOTMAIL.COM>

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