4. If ricost cosh t+j sint sinh t, where i and j are constant orthogonal vectors prove that (a) |F|2|r| (b) F is orthogonal to r

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter8: Applications Of Trigonometry
Section8.4: The Dot Product
Problem 12E
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4. If ricost cosh t+j sin t sinh t, where i and j are constant orthogonal vectors,
prove that
(a) || = 2|r|
(b) F is orthogonal to r
Transcribed Image Text:4. If ricost cosh t+j sin t sinh t, where i and j are constant orthogonal vectors, prove that (a) || = 2|r| (b) F is orthogonal to r
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