Practice problem
Rewrite the product as a sum. cos(6t)+cos(4t)\\\cos(6t)+\cos(4t)cos(6t)+cos(4t)
2sin(5t)cos(t)2\sin(5t)\cos(t)2sin(5t)cos(t)
2sin(t)cos(5t)2\sin(t)\cos(5t)2sin(t)cos(5t)
2cos(5t)cos(t)2\cos(5t)\cos(t)2cos(5t)cos(t)
2sin(5t)sin(t)2\sin(5t)\sin(t)2sin(5t)sin(t)
Type a concept, like “slope” or “photosynthesis”.