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heatherh294

  • 3 years ago

Find local min and max and the points of inflection for f(x)= 3(cos(x))^2 - 6sin(x)

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  1. freewilly922
    • 3 years ago
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    Do you know how to do the chain rule with respect to trig functions?

  2. freewilly922
    • 3 years ago
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    Example \[ \bigg(\cos^4(x)\bigg)^{\prime}=4\cos^3(x)\]

  3. freewilly922
    • 3 years ago
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    oh and generally \[\cos^2(x) = (\cos(x))^2\]

  4. anonymous
    • 3 years ago
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    ?

  5. anonymous
    • 3 years ago
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    let me write it correctly \[f'(x)=-6\cos(x)\sin(x)-6\cos(x)]\] that's better

  6. myininaya
    • 3 years ago
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    \[\(cos^2(x))'=2\cos(x)(-\sin(x))=-2\cos(x)\sin(x)\]

  7. myininaya
    • 3 years ago
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    @freewilly922 your example is a little off

  8. anonymous
    • 3 years ago
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    mine was way off!

  9. myininaya
    • 3 years ago
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    Corrected example from above: \[(\cos^4(x))'=4\cos^3(x)(-\sin(x))=-4\cos^3(x)\sin(x)\]

  10. anonymous
    • 3 years ago
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    i just ate a mini kitkat

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