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onegirl

  • one year ago

Use a pythagorean Trig. Identity to simplify the function, then take derivative of this function. f(x) = 4x^2 tan x.

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  1. onegirl
    • one year ago
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    @Mertsj can u help?

  2. Mertsj
    • one year ago
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    Is it: \[4x^2\tan x\]

  3. onegirl
    • one year ago
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    yes

  4. Mertsj
    • one year ago
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    \[\tan x=\sqrt{1-\sec ^2x}\]

  5. Mertsj
    • one year ago
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    That's using a Pythagorean identity.

  6. onegirl
    • one year ago
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    ok

  7. Mertsj
    • one year ago
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    So you would be taking the derivative of \[4x^2\sqrt{1-\sec ^2x}\]

  8. onegirl
    • one year ago
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    okay i'll do that

  9. Mertsj
    • one year ago
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    ok

  10. onegirl
    • one year ago
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    i got 4x(x + sin(2x)) sqrt(tan^2 (x)) csc (x) sec (x)

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