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18:11
YouTube
Ms Havrot's Canadian University Math Prerequisites
Advanced Functions 7.1 Equivalent Trigonometric Functions including cofunctions!
In this lesson we will look at different equations for the same trig graph, cofunction identities, identities describing negative angles as well as the principal angles as they relate to pi in the various quadrants. It's a very basic but important lesson that will show up later in this chapter. Learn them well!
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