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Wm779

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Algebra
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1. The angle 𝛼 shown in red is negative (clockwise from the positive x-semiaxis). One of its coterminal angles 𝛽 is shown in green (counterclockwise). These angles are measured from the positive x-semiaxis to the same (red) side, therefore they are coterminal. 2. Trigonometry is used in building construction. For example, the slope of any entrance ramp is required to be no more than 1 to 12. If we consider the angle between a ramp and a horizontal line, this ratio appears to be tangent of this angle. It is the same regardless of the point where we perform our measures. By the way, we can measure sine of the angle instead of tangent, then we need to measure the length of a ramp instead of its horizontal length, which might be simpler. The bounding ratio will remain almost the same (about 1 to 12.04). 3. The movement of a rider on a skycoaster becomes more or less periodical afte ...
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Anonymous
Very useful material for studying!

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