Find the direction cosines and angles of u and show that cos a + cos B + cos? y = 1. (Round your answers for the angles to four decimal plas u = -4i + 5j + 9k cos a = rad cos B = rad cos y = y = rad

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.2: Trigonometric Functions Of Angles
Problem 2E
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Find the direction cosines and angles of u and show that cos a + cos ß + cos y = 1. (Round your answers for the angles to four decimal places.)
u = -4i + 5j + 9k
cos a =
rad
rad
cos ß =
rad
cos y =
Transcribed Image Text:Find the direction cosines and angles of u and show that cos a + cos ß + cos y = 1. (Round your answers for the angles to four decimal places.) u = -4i + 5j + 9k cos a = rad rad cos ß = rad cos y =
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