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hawkfalcon Group Title

Find cos(theta) if tan(theta) = (-2/3) and sin(theta) > 0

  • 2 years ago
  • 2 years ago

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  1. hawkfalcon Group Title
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    Find \[\cos \theta if \tan \theta = -2/3 and \sin \theta >0\]

    • 2 years ago
  2. qpHalcy0n Group Title
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    Here, you know that the tangent is opp/adjacent. Since the sine is positive, it must be in either the first or second quadrant right?

    • 2 years ago
  3. hawkfalcon Group Title
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    Yes.

    • 2 years ago
  4. qpHalcy0n Group Title
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    So the opposite leg must be positive, therefore since the tangent is negative the adjacent leg must be the negative one. So what quadrant is that?

    • 2 years ago
  5. hawkfalcon Group Title
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    Oh so you know o and a, you just need to find the h, and you can solve it :P

    • 2 years ago
  6. qpHalcy0n Group Title
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    Yep.

    • 2 years ago
  7. qpHalcy0n Group Title
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    Lets see what ya got when ya get it.

    • 2 years ago
  8. hawkfalcon Group Title
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    Thats 2nd quad

    • 2 years ago
  9. hawkfalcon Group Title
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    Okay:)

    • 2 years ago
  10. qpHalcy0n Group Title
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    Yep.

    • 2 years ago
  11. hawkfalcon Group Title
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    \[\frac{ -3 }{ \sqrt{13}}\]

    • 2 years ago
  12. qpHalcy0n Group Title
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    Thats it.

    • 2 years ago
  13. hawkfalcon Group Title
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    :D thank you!

    • 2 years ago
  14. qpHalcy0n Group Title
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    No prob.

    • 2 years ago
  15. Yasir_se Group Title
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    \[\frac{ x \sqrt{\left| x ^{2}-4 \right|} }{ x ^{2}-4 }-1>0\]

    • 2 years ago
  16. hawkfalcon Group Title
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    @Yasir_se wtf?

    • 2 years ago
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