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aussy123

  • 3 years ago

I have a question, can someone answer me. Metal awarded.

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  1. aussy123
    • 3 years ago
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    I have a problem and it ask for tan2theta, and theta is in the 1st quad, but when I work out the problem I get a negative result. Do that number automatically turns positive?

  2. aussy123
    • 3 years ago
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    does*

  3. aussy123
    • 3 years ago
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    do you know anything about tan, sin and cos?

  4. completeidiot
    • 3 years ago
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    \[\tan^2 \theta\] \[0^\circ<\theta<90^\circ\] whats the question?

  5. completeidiot
    • 3 years ago
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    or is it \[\tan (2\theta)\]?

  6. aussy123
    • 3 years ago
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    \[\tan2\Theta\]

  7. completeidiot
    • 3 years ago
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    what is the original question?

  8. aussy123
    • 3 years ago
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    Given: sin =4/5 and cos x =-5/13 ; evaluate the following expression. (Theta: Quadrant I, x : Quadrant II.) tan 2 Theta a.) 8/3 b.) 24/7 c.) -24/7

  9. aussy123
    • 3 years ago
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    my outcome is -24/7 but theta is in the first quad and tan is positive in the first quad

  10. Mertsj
    • 3 years ago
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    If theta is greater than 45 and in the first quadrant, then 2 theta is in the second quadrant where the tangent is negative.

  11. completeidiot
    • 3 years ago
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    yes theta is in the first quadrant, but you're not finding tan(theta) you're finding tan(2*theta) and its possible for 2*theta to be in the second quadrant as mertsj just stated

  12. aussy123
    • 3 years ago
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    So my result stays at -24/5

  13. aussy123
    • 3 years ago
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    *-24/7 sorry

  14. completeidiot
    • 3 years ago
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    assuming you didnt make any mistakes in your calculation, then that would be the answer note- i didnt actually do the problem

  15. aussy123
    • 3 years ago
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    okay Thank You both, now I can start my quiz with no problem. fingers crossed!

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