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what is arctan?

Guest Mar 1, 2017

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 #1
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Arctan is the same as inverse tan.

 

You use it to find an angle.

More info here.

 

http://www.mathsisfun.com/algebra/trig-inverse-sin-cos-tan.html

Melody  Mar 1, 2017
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2+0 Answers

 #1
avatar+89781 
+5
Best Answer

Arctan is the same as inverse tan.

 

You use it to find an angle.

More info here.

 

http://www.mathsisfun.com/algebra/trig-inverse-sin-cos-tan.html

Melody  Mar 1, 2017
 #2
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+5

Arctan x   means 'the angle whose tangent is x'      As does arcsinx means 'the angle whose sine is x'.    When you see arctan,arcsin,arccos,  you are looking at expressions for angles.    -    Here's a handy thing to know: --

 

 

If you know that arctan x = 1/2 ,for example,you can draw the right-angled triangle with opposite side length 1,adjacent side 2  and find all sides and angles.  As you can if you were given similar expressions for arcsin etc.

Guest Mar 1, 2017

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