The depth of water, d feet, in a channel t hours after midnight is d = 2 cos -t + 11. Find the channel depth at (a) 6 P.M. (low tide). (b) noon (high tide). (a) The channel depth at 6 P.M. is feet. (Simplify your answer.)

Trigonometry (MindTap Course List)
10th Edition
ISBN:9781337278461
Author:Ron Larson
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Chapter2: Analytic Trigonometry
Section2.1: Using Fundamental Identities
Problem 67E
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The depth of water, d feet, in a channel t hours after midnight is d = 2 cos
+ 11. Find the channel depth at
(a) 6 P.M. (low tide).
(b) noon (high tide).
(a) The channel depth at 6 P.M. is
feet.
(Simplify your answer.)
Transcribed Image Text:The depth of water, d feet, in a channel t hours after midnight is d = 2 cos + 11. Find the channel depth at (a) 6 P.M. (low tide). (b) noon (high tide). (a) The channel depth at 6 P.M. is feet. (Simplify your answer.)
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