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5:25
YouTube
Professor Dave Explains
Basic Trigonometric Identities: Pythagorean Identities and Cofunction Identities
Now that we know what these trigonometric functions are, how do they relate to one another? In a variety of ways, in fact! There are lots of identities we will have to learn so that we can do algebra with trig functions later, so let's learn these now. Watch the whole Mathematics playlist: http://bit.ly/ProfDaveMath Classical Physics Tutorials ...
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