Asked by Nick

If a 14-ft ladder leans
against a building, with an angle of elevation of 70°, how far up the building will the ladder
reach?

I believe this requires law of cosines but otherwise I am lost.

Answers

Answered by Steve
nope. Just the definition of the sine:

h/14 = sin 70°

For the law of cosines, you need two sides and their included angle.
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