Use the figure to prove the law of cosines (which is a generalization of the Pythagorean theorem):
Question:
Use the figure to prove the law of cosines (which is a generalization of the Pythagorean theorem): c2 = a2 + b2 - 2ab cos θ.
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Using the given diagram drop a perpendicular from the point b cos b sin to ...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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