Unformatted text preview: b) If a boat can only enter and leave the harbor when the depth of the water exceeds 6 meters, for how long each day is this possible? Twice a day for 4 hours and 26 minutes. 8. How can you determine, prior to solving a trigonometric equation, how many possible answers you should have? Determine how many periods are in the interval in which the solutions lie and how many solutions are found within one period. This will give the total number of solutions. 5. cos 2 x + 2cos x + 1 = 0 (cos x + 1)(2cos x + 1) = 0 cos x = 1 x = 180 o 6 . 2sin 2 x = sin x 2sin 2 x – sin x= 0 sin x(2sin x – 1) = 0 sin x = 0 or sin x = ½ x = 0, 180 o , 30 o , 150 o...
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 Fall '08
 GERMAN
 Calculus, PreCalculus, Trigonometry, Advanced Math, Equations, Sin

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