In a recently updated, yet-to-be-peer-reviewed paper, Odrzywołek says he has, in essence, developed a two-button calculator that can compute the standard repertoire of a scientific calculator familiar ...

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I make short, to-the-point online math tutorials. I struggled with math growing up and have been able to use those ...

In this video I will show you how to solve a trigonometric equation using the double angle for cosine. When applying the double angle of cosine we are given a quadratic equation where we will now need ...