Derive the following expressions by using vector algebra. (a) cos (a ) = cos a cos
Question:
(a) cos (a – β) = cos a cos β + sin a sin β
(b) sin (a – β) = sin a cos β – cos a sin β
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a We begin by noting that We can also write that a b ...View the full answer
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Related Book For 
Calculus Early Transcendentals
ISBN: 978-0321947345
2nd edition
Authors: William L. Briggs, Lyle Cochran, Bernard Gillett
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