Evaluate the expression without using a calculator. (Sketch a right triangle).

Question

moonlitfate · Answer

$$\tan (\arccos \frac{ \sqrt{2} }{ 2 })$$

anonymous · Answer

same as before

anonymous · Answer

|dw:1408508386087:dw|

anonymous · Answer

find the other side
you can do it in your head 
$$2^2-\sqrt2^2=4-2=2$$

anonymous · Answer

method 2
know tha t
$$\cos(\frac{\pi}{4})=\frac{\sqrt2}{2}$$ and that 
$$\tan(\frac{\pi}{4})=1$$

moonlitfate · Answer

APologies.  I'm just trying to really understand this.  Maybe, I'm thinking about it too much.

anonymous · Answer

yes you are thinking way too much i think
then again if you have not seen trig for a while, who can remember all this stuff?

moonlitfate · Answer

Then again, the massive amount of Trig. and Calculus rust.  Yeah, I haven't seen any of this for a good year.