Our final section in Chapter 7 is over converting sums/differences to products, or products to sums/differences using the last remaining section of the formula chart.
Example 7 (last example) on the 7.6 notes
7.6 notes over Double/Half Angle Formulas (all but last example)
I got caught off in the last question.
Introduces sum/difference formulas (noted as composite argument properties on your formula chart) of sin/cos/tan
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