https://doi.org/10.4169/college.math.j.47.5.356 https://www.jstor.org/stable/10.4169/college.math.j.47.5.356 This paper provides a new, long proof of the Pythagorean ...
Two high school students have proved the Pythagorean theorem in a way that one early 20th-century ... These functions, such as the sine and cosine, are defined using right triangles. Imagine a right ...
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