Question

How is tan (pi/4)=1?

Answer 1

well you know your unit circle, right?
here's an example: http://mathprecalculus.wikispaces.com/Chapter+5.1+Unit+Circle+Approach

pi/4 is 45 degrees
the coordinating pair is \[\sqrt{2}/2 , \sqrt{2}/2\] (cosine, sine)

and tangent is sine/cosine

SO

tan of pi/4 = \[(\sqrt{2}/2)/(\sqrt{2}/2)\]

which is 1

Answer 2

@WinterRaine I get it, thanks.

Answer 3

your welcome!