# Trig ?

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atan is supposed to be arc tangent correct? Well if I have 15/15 = 1 and atan(1) should = 45. Or tan^-1 on my Ti83+ shows 45 and that is what I am after. Now with my code I get .785??? Any ideas? Thanks

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 Original post by MARS_999atan is supposed to be arc tangent correct? Well if I have 15/15 = 1 and atan(1) should = 45. Or tan^-1 on my Ti83+ shows 45 and that is what I am after. Now with my code I get .785???Any ideas? Thanks

It's in radians. pi / 4 = 0.785. Convert to degrees by (* 180 / pi)

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Original post by Omid Ghavami
Quote:
 Original post by MARS_999atan is supposed to be arc tangent correct? Well if I have 15/15 = 1 and atan(1) should = 45. Or tan^-1 on my Ti83+ shows 45 and that is what I am after. Now with my code I get .785???Any ideas? Thanks

It's in radians. pi / 4 = 0.785. Convert to degrees by (* 180 / pi)

Yep, I just figured that out... Thanks anyway.

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