Asked by joan
find tan 30 degrees and tan 45 degrees using the 45-45-90 triangle therom and
30-60-90 triangle theorm
30-60-90 triangle theorm
Answers
Answered by
Reiny
In an easily accessible part of your notebook
make a sketch of a 30-60-90 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 45-45-90 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
make a sketch of a 30-60-90 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 45-45-90 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
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