Precalculus
Sum and Difference Identities — Video Lecture Part 2 (§7.2)
Video Lecture
·Streaming video
[ ] Watch the lecture before or after class
[ ] Pause and rewind any tricky step
[ ] Follow along with the guided outline
[ ] Re-watch before the exam
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Part 2 of the video lecture for 7.2 Sum and Difference Identities. Continues with worked examples applying the sum and difference formulas for sine, cosine, and tangent.
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"I've never been good at math. But with these outlines I actually followed along in class for the first time — and I passed."