Pre-Calculus Homework Solutions 212

Pre-Calculus Homework Solutions 212 - 10 H tan8 AF tan8 AF...

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10. The angle of depression between the horizontal and the flight of the helicopter H to the landing pad P is / GHP . The ground and the horizontal from the helicopter are parallel. Therefore, m / GHP 5 m / HPQ since they are alternate interior angles. Let x 5 m / HPQ . tan x ° ¬ 5 } 0 1 . 1 5 } x ¬ 5 tan 2 1 1 } 0 1 . 1 5 } 2 x ¬ < 2.6 The angle of depression is about 2.6°. 11. The angle of depression between the horizontal and the sledding run is / DAC . The horizontals from the top of the run and the bottom of the run are parallel. Therefore, m / DAC 5 m / ACB since they are alternate interior angles. Let x 5 m / ACB . sin x ° ¬ 5 } 2 3 7 0 . 0 6 } x ¬ 5 sin 2 1 1 } 2 3 7 0 . 0 6 } 2 x ¬ < 5.3 The angle of depression is about 5.3°. 12. Let x represent m / ACB . sin x ° ¬ 5 } 36 6 9 3 . 5 39 } x ¬ 5 sin 2 1 1 } 36 6 9 3 . 5 39 } 2 x ¬ < 35.6 The angle of elevation (incline) is about 35.6°. 13.
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