RE: [ferret_users] Is tan inverse possible?

To: "'Ravindra Jadhav'" <shivswaraj@xxxxxxxxx>, "ferret_users@xxxxxxxx" <ferret_users@xxxxxxxx>

Subject: RE: [ferret_users] Is tan inverse possible?

From: "Kaduk, Joerg (Dr.)" <jk61@xxxxxxxxxxxxxxx>

Date: Wed, 20 Apr 2011 14:08:40 +0100

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Thread-topic: [ferret_users] Is tan inverse possible?

Hi Ravindra,

you can calculate the arctan from other inverse trig functions using some of the

various relationships between them – something like:

$\arctan x = \arcsin \frac{x}{\sqrt{x^2+1}}$

– see:

http://en.wikipedia.org/wiki/Inverse_trigonometric_functions

Be aware of the various periodicities and ranges, though, to ensure you get a meaningful

result.

Cheers,

Jörg

--
Jörg Kaduk
Lecturer
Department of Geography         J.Kaduk@xxxxxxxxxxxxxxx
University of Leicester         joerg@xxxxxxxxxxxxxxxxxxx
UK - Leicester LE1 7RH         Tel: + 44 (0)116 2523848
http://www.le.ac.uk/geography/staff/academic_kaduk.html

From: owner-ferret_users@xxxxxxxx [mailto:owner-ferret_users@xxxxxxxx] On Behalf Of Ravindra Jadhav
Sent: 20 April 2011 08:00
To: ferret_users@xxxxxxxx
Subject: [ferret_users] Is tan inverse possible?

I have not been able to find TAN INVERSE function in ferret. Is it possible?

Thanks.