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Trigonometry question

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A beam 25 feet long leans against a wall. If the top of the beam rests at a point on the wall 17.5 feet above the floor, what is the angle the beam makes with the wall?

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Answers a trigonometry question.

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hypotenuse= length of the beam= 25 feet
altitude= 17.5 feet

Therefore Sin phi = ...

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