Trigonometry

10. A person notices that the angle of elevation from where he is standing to the top of a pole is 40°. Then he backs up

12 feet and notices that the angle of elevation to the top of the pole is now 32°. How tall is the pole?

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  1. draw the diagram. It should be clear that if the height is h,

    h cot32° - h cot40° = 12

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