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The quadrant mistake in arctan problems

In this video, I explain how to evaluate the arctan of negative square root of 3 over 3, focusing on inverse trigonometric ...
Berkshire Eagle

Williams professor asks: Why does nature like the square root of negative 1?

WILLIAMSTOWN -- William Wootters has a conundrum -- a mathematical conundrum. Wootters is a physics professor at Williams College, and on Thursday he's one of the presenters of the Williams Faculty ...