What is arctan(0)?!?!?!(adsbygoogle = window.adsbygoogle || []).push({});

I tired using my calculator (its a ti-83 plus) I hit [sec] button then [tan] then [ 0 ] and [ ) ] and it gives me 0 as answer It is in rad mode too (deg mode is same results)

I tried using the google calculator and it gives me 0 also!

http://www.google.com/search?hl=en&q=arctan(0)

BUT my math book says its pie!!!!

Then it tried tan(pi) and indeed that does = 0!!!

WHY!??!!? doenst arctan(0) = pi?

Another question

What is arctan(1/0) ??? doens that = impossible?? (if i use my calc it says cant divide by 0)

However the answer is pi/2?!??! WHYYY

Thanks for the help

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# Homework Help: How to calculate arctan(0) ?

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