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lalokio

  • 3 years ago

double derivative of y = -5cosx be y'' = 5cosx or -cosx? I believe it's + cosx but I wanna make sure.

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  1. myininaya
    • 3 years ago
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    And what did you get for y'?

  2. lalokio
    • 3 years ago
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    y' = 5sinx . I'm assuming the - cancels out since it's already -.

  3. myininaya
    • 3 years ago
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    y' is correct So what is derivative of sin(x)? And don't forget to bring our constant multiple down.

  4. myininaya
    • 3 years ago
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    And yes a negative times a negative is a positive.

  5. lalokio
    • 3 years ago
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    cosx

  6. lalokio
    • 3 years ago
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    cosx

  7. myininaya
    • 3 years ago
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    Right so y''=5cos(x)

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