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Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)
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You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?
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Which equation is y = -6x2 + 3x + 2 rewritten in vertex form?
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How many solutions does 400=x times x have...
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