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Find the direction cosines and angles of u and show that cos2 a + cos2 ß + cos2 y = 1. (Round your answers for the angles to four decimal places.)
u = -4i + 3j + 7k
cos a =
rad
cos B =
rad
cos y =
rad
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Transcribed Image Text

Find the direction cosines and angles of u and show that cos2 a + cos2 ß + cos2 y = 1. (Round your answers for the angles to four decimal places.) u = -4i + 3j + 7k cos a = rad cos B = rad cos y = rad