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$$\cos(2\pi50t)+2\cos(2\pi150t)$$
Can these be further simplified?
What is the addition of this called? Trigo identity?

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    I'm having difficulty understanding the question. Did you intend the contents of the parentheses to be fractions?2012-02-25
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    Other than multiplying your integers together, that's about as simple as it gets.2012-02-25
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    that is just part of the equations. but the full expression is similiar, its the result of multiplication of 2 equations. So I'm wondering can I simply add them together? and become 3cos(2$\pi$200t)?2012-02-25

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