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anonymous

  • one year ago

I'm so frustrated on this problem! Please help! This is my first time on open study, please help! In △PQR, find the measure of ∡P.

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    Can anyone see the picture I posted for the problem.

  3. imqwerty
    • one year ago
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    Can u find out tan of angle P

  4. phi
    • one year ago
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    this is trig. If you need a quick refresher, see https://www.khanacademy.org/math/geometry/right_triangles_topic/cc-geometry-trig/v/basic-trigonometry

  5. anonymous
    • one year ago
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    I do know that the tan function is opposite over adjacent. So then that'd put 33.8/57.6

  6. imqwerty
    • one year ago
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    Yes can u calculate its value

  7. phi
    • one year ago
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    yes. now use a calculator

  8. anonymous
    • one year ago
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    Don't you divide 33.8 into 57.6 and get 0.5868, but then you'd need to use something else which then confuses me.

  9. phi
    • one year ago
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    you have tan x = 0.5868... use "inverse tan" or \( \tan^{-1} \) key on 0.5868...

  10. imqwerty
    • one year ago
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    Yes now do uknw the value of tan60degrees

  11. imqwerty
    • one year ago
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    Sorry i mean tan(30)

  12. anonymous
    • one year ago
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    Would you type in: tan^-1 and then 0.5868?

  13. phi
    • one year ago
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    On my calculator, I first type in the number then hit shift (or inverse) then tan (marked \(\tan^{-1} \)

  14. anonymous
    • one year ago
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    Oh, I forgot to tell you guys the answer choices: A) 30.4 B) 35.9 C) 54.1 D) 59.6

  15. phi
    • one year ago
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    it will be obvious if you figure out how to use your calculator.

  16. imqwerty
    • one year ago
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    ^

  17. anonymous
    • one year ago
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    I'm trying to figure it out now. Just a second.

  18. anonymous
    • one year ago
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    So, I did like you said, I typed in the number (0.5868) and then I pressed shift and press tan^-1, but it gave me an error?

  19. phi
    • one year ago
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    try it the other way

  20. anonymous
    • one year ago
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    I did tan^-1 and typed in the numbers as well, and it gave me: 0.5306

  21. phi
    • one year ago
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    you are in radian mode. multiply by 180/pi or easier, change your mode to degrees

  22. anonymous
    • one year ago
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    How would I change the mode? The calculator I'm using is a Casio. Sorry if I'm making this challenging, I'd just like to understand the problem.

  23. phi
    • one year ago
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    what model casio ?

  24. anonymous
    • one year ago
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    fx-9750GII

  25. phi
    • one year ago
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    I'm looking at the manual. meanwhile, to get the answer, multiply 0.5306*180/pi

  26. anonymous
    • one year ago
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    Thank you for you help by the way, so I punched in what you told me to and I got: 30.416

  27. phi
    • one year ago
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    which rounds to 30.4º to change mode to "degrees" use shift menu (this gets you to "setup")

  28. anonymous
    • one year ago
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    Okay, I did that. Then what?

  29. phi
    • one year ago
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    you should see "angle" at the bottom scroll down using the "down cursor"

  30. anonymous
    • one year ago
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    Yes, then press Execute?

  31. phi
    • one year ago
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    it says press function keys to change the setting?

  32. phi
    • one year ago
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    try F1

  33. phi
    • one year ago
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    yes, execute, then F1 (I am guessing)

  34. anonymous
    • one year ago
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    Okay, I'll try it. Just a moment please.

  35. anonymous
    • one year ago
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    Hm, so I pressed execute then F1, it takes me to the Matrix suggestions. They're from A-Z and then after Z is Mat Ans.

  36. phi
    • one year ago
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    were you on the "angle" line when you hit exe ?

  37. anonymous
    • one year ago
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    Yes, I was.

  38. phi
    • one year ago
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    try again, just to be sure

  39. anonymous
    • one year ago
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    Okay, I'll tell you what I've been doing. I press the shift button and then press the Menu button but it takes me to the Set Up since that is for the shift button. Then I move downward to "Angle" and next to the word angle on the far right is the words: " :Rad" I then press Execute and go to F1, not using the shift bar or anything else.

  40. phi
    • one year ago
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    maybe once you are at the angle line, just press F1 ?

  41. anonymous
    • one year ago
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    It doesn't take me anywhere.

  42. phi
    • one year ago
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    does rad change to deg ?

  43. anonymous
    • one year ago
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    Oh, yes it does. Once I pressed F1 it changed to Deg.

  44. phi
    • one year ago
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    now use exit button

  45. anonymous
    • one year ago
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    Okay, then what next?

  46. phi
    • one year ago
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    check it works, try shift tan ( \(\tan^{-1} \) ) 0.5868

  47. anonymous
    • one year ago
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    I typed in exactly what you told me to and I got: 30.4. So yes, it worked! I'm so happy. Thank you for helping me through this problem and fixing my calculator haha. You've been a great help!

  48. phi
    • one year ago
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    so what you did was tan x = 0.5868 then you did "inverse tan" of both sides \[ \tan^{-1}\left( \tan x\right) = \tan^{-1} 0.5868 \\ x= \tan^{-1} 0.5868 \\ x= 30.4 \ degrees \]

  49. anonymous
    • one year ago
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    Yes, I understand fully now how I got my answer. Is there any way you could help me on another problem I have?

  50. phi
    • one year ago
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    please close this post and make a new one. (this one is a bit long)

  51. anonymous
    • one year ago
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    Okay, thank you!

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