Concept explainers
(Modeling) Solve each problem.
Back Stress If a person bends at the waist with a straight back making an
(a) Calculate force F, to the nearest pound, for W = 170 Ib and θ = 30º.
(b) Use an identity to show that F is approximately equal to 2.9W cos θ.
(c) For what value of θ is F maximum?
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Trigonometry, Books a la Carte Edition (11th Edition)
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