OpenStax, Algebra and Trigonometry 2e §9.5 Solving Trigonometric Equations · Exercise 97 · Trigonometry · Identities
Solving Trigonometric Equations · Exercise 97
An astronaut is in a launched rocket currently 15 miles in altitude. If a man is standing 2 miles from the launch pad, at what angle is the astronaut looking down at him from horizontal? (Hint: this is called the angle of depression.)
OpenStax, Algebra and Trigonometry 2e · §9.5 Solving Trigonometric Equations · Exercise 97
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