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# I need the answer. this one really put me crazy. just an example from teacher. need an answer. thank you!

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a tree 100 feet tall casts shadow 120 feet long. Find the angle of elevation of the sun

Oct 17, 2017

### Best Answer

#1
+7348
+1

Angle  a  is the angle of elevation to the sun.

tan a  =  opposite side / adjacent side

Plug in the values for the opposite and adjacent side

tan a  =  100 ft / 120 ft

tan a  =  5 / 6

Take the inverse tangent of both sides.

a  =  arctan( 5 / 6 )                                  Put this into a calculator to get...

a  ≈  39.806 degrees

Oct 17, 2017

### 1+0 Answers

#1
+7348
+1
Best Answer

Angle  a  is the angle of elevation to the sun.

tan a  =  opposite side / adjacent side

Plug in the values for the opposite and adjacent side

tan a  =  100 ft / 120 ft

tan a  =  5 / 6

Take the inverse tangent of both sides.

a  =  arctan( 5 / 6 )                                  Put this into a calculator to get...

a  ≈  39.806 degrees

hectictar Oct 17, 2017

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