Try another version of this question
Write the product as a sum:
`6cos(37b)cos(13b) = `
`6cos(37b)cos(13b) = `
Get help:
Box 1: Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c
Be sure your variables match those in the question
`3 cos(50 b) + 3 cos(24 b)`