During summer, the height of the water in a pool decreased by 2 inches each week due to evaporation. What is the change in the h
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It is known
and
(if you want to determine cosine of 30° you should draw the perpendicular line to the x-axis and find the point of intersection, the value of x-coordinate is the cosine of 30°).
The angle
and
(see image).
The angle
and
(see image).
The angle
The angle