Try another version of this question Write the product as a sum: `16cos(43s)cos(15s) = ` Get help: VideoBox 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 `8 cos(58 s) + 8 cos(28 s)`
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Get help: Video
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