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Luigi0210

  • 2 years ago

How would I start this? Tangent line problem.

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  1. Luigi0210
    • 2 years ago
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    http://prntscr.com/2x1nzl

  2. myininaya
    • 2 years ago
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    You to find when f'=0

  3. Luigi0210
    • 2 years ago
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    Oh, alright, seems simple enough, thanks!

  4. myininaya
    • 2 years ago
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    Did you ever find f'?

  5. Luigi0210
    • 2 years ago
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    It would be \[\LARGE f'(x)=2cosx+2sinxcosx\] right?

  6. myininaya
    • 2 years ago
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    right now set that =0 and solve for x

  7. myininaya
    • 2 years ago
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    \[2\cos(x)(1+\sin(x))=0\]

  8. myininaya
    • 2 years ago
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    Solve both equations: cos(x)=0 1+sin(x)=0

  9. Luigi0210
    • 2 years ago
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    And that'll give me x, to plug in and find y right?

  10. myininaya
    • 2 years ago
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    yep once you get x here make sure you plug into f(x) to get the corresponding y for each x in that domain given.

  11. Luigi0210
    • 2 years ago
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    Alright, thanks again myininaya :)

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