Practice problem
Rewrite the product as a sum. sin(3x)+sin(7x)\\\sin(3x)+\sin(7x)sin(3x)+sin(7x)
2sin(5u)cos(2u)2\sin(5u)\cos(2u)2sin(5u)cos(2u)
−2sin(2u)cos(5u)-2\sin(2u)\cos(5u)−2sin(2u)cos(5u)
2cos(5u)cos(2u)2\cos(5u)\cos(2u)2cos(5u)cos(2u)
−2sin(5u)sin(2u)-2\sin(5u)\sin(2u)−2sin(5u)sin(2u)
Type a concept, like “slope” or “photosynthesis”.