OpenStax, Algebra and Trigonometry 2e §9.4 Sum-to-Product and Product-to-Sum Formulas · Example 2 · Trigonometry · Compound & multiple angles
Writing the Product as a Sum Containing only Sine or Cosine
Express the following product as a sum containing only sine or cosine and no products:
OpenStax, Algebra and Trigonometry 2e · §9.4 Sum-to-Product and Product-to-Sum Formulas · Example 2
Stuck? A gentle nudge
No hints for this one.
Your working
Check your full solution
Upload photos of your handwritten work or a PDF, and Lemma will read it and tell you whether it's right — and where it first goes wrong if not.