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...We may also use coins to demonstrate their relationship to fractions... how a quarter is really a quarter of a dollar and four of them equal one dollar. I retired from developmental optometry in 2011 and I started tutoring shortly thereafter. When my student asks, "Why is trigonometry important?" I can answer that trigonometry is used to calculate the path of a light ray as it is refracted. (read more)
8 Subjects: includingTrigonometry,Geometry,Algebra 1,ACT Math