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28-05-2017
Mathematics

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A laser light, placed 16m from the base of the wall, shines a point on the wall that is 7m up from the ground. At what angle of elevation should the light be set?

Respuesta :

28-05-2017

tanα=opposite/adjacent

tanα=height/distance

tanα=7/16

α=arctan(7/16)°

α≈23.63° (to nearest hundredth of a degree)

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