Posted by joan on .
find tan 30 degrees and tan 45 degrees using the 454590 triangle therom and
306090 triangle theorm

math 
Reiny,
In an easily accessible part of your notebook
make a sketch of a 306090 triangle, and put in the values
1 opposite the 30°
√3 opposite the 60°
2 opposite the hypotenuse
MEMORIZE THESE VALUES
(the smallest is opposite the smallest angle, etc..)
Do the same for the 454590 using sides
1  1  √2
now tanØ = opposite/adjacent or y/x
tan 30 = 1/√3 , look at your triangle
tan 45 = 1/1 = 1
check with your calculator