One More Path To Trigonometric Addition Formulas

There's something truly beautiful about the internal consistencies of mathematics. Thanks to its nature we get to hike on such a variety of paths to reach the same destination.  Math becomes a mental traveler's paradise. Consider the trigonometric addition formulas: sin(x + y) = sin(y) cos(x) + sin(x) cos(y)  and cos (x + y) =... Continue Reading →

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