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anonymous

  • 5 years ago

Find f(g(x)) and g(f(x)). f(x)=-7x g(x)=cosx

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  1. anonymous
    • 5 years ago
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    f(g(x))=-7cosx

  2. anonymous
    • 5 years ago
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    g(f(x))=cos(-7x)

  3. anonymous
    • 5 years ago
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    correct?

  4. anonymous
    • 5 years ago
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    looks right , note that cos -7x = cos 7x

  5. anonymous
    • 5 years ago
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    Ok, so answer that I had for g(f(x)) is incorrect?

  6. anonymous
    • 5 years ago
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    cos7x is a fully-simplified answer?

  7. anonymous
    • 5 years ago
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    its a picky answer.. yes look right.

  8. anonymous
    • 5 years ago
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    And this is due to the even-odd property of cos, yes?

  9. anonymous
    • 5 years ago
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    right the cosine of a negative angle is equal to the cosine of the positive.

  10. anonymous
    • 5 years ago
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    Ok, thank you.

  11. anonymous
    • 5 years ago
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    yup

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