A water wheel rotates through the angle x, the water level L behind the wheel changes according to the equation ?=1−sin?−2cos^2 ?  where L is measured in inches. Determine all values of x in degrees for which the water level is zero.

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter4: Exponential And Logarithmic Functions
Section4.7: Logarithmic Scales
Problem 17E
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A water wheel rotates through the angle x, the water level L behind the wheel changes according to the equation
?=1−sin?−2cos^2 ? 
where L is measured in inches. Determine all values of x in degrees for which the water level is zero.
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