Practice problem
Rewrite the product as a sum. 20cos(36t)cos(6t)\\20\cos(36t)\cos(6t)20cos(36t)cos(6t)
10[sin(42t)+sin(30t)]10[\sin(42t)+\sin(30t)]10[sin(42t)+sin(30t)]
10[cos(30t)−cos(42t)]10[\cos(30t)-\cos(42t)]10[cos(30t)−cos(42t)]
10[cos(42t)+cos(30t)]10[\cos(42t)+\cos(30t)]10[cos(42t)+cos(30t)]
Type a concept, like “slope” or “photosynthesis”.