i need help basic math, me forgot formula

Discussion in 'Homework Help' started by hkra, Jul 3, 2005.

  1. hkra

    Thread Starter Member

    Jul 3, 2005
    18
    0
    50 + j282.6

    answer = 287 /_ 80º

    the 80º how to find out? can anyone show me the formula and steps for scientific calculator to press?

    or

    50 + j471

    answer = 473.6 /_ 84º

    the 84º how to find out? can anyone show me the formula and steps for scientific calculator to press?

    urgently by.
    hkra
    (appreciate for your help)
     
  2. hkra

    Thread Starter Member

    Jul 3, 2005
    18
    0
    i did with this formula

    http://www.uploadhut.com/upload/192752.jpg??
    click on the screenshot i created

    but my answer came out was 10 /_ 40.97˚

    the correct answer is 36.8 ˚

    which is exactly answer?

    also i using the formula on picture above but the below 2 my answer wasn't same to the below answer, why?

    -

    50 + j282.6

    answer = 287 /_ 80º

    -

    50 + j471

    answer = 473.6 /_ 84º

    hope you can help me! i'll in exam sooner.

    thanks alot!
     
  3. hkra

    Thread Starter Member

    Jul 3, 2005
    18
    0
    thx for your help i can solved it

    my other question is now

    http://tinypic.com/6qfn9s.jpg

    IR answer is: 2.31/20 = 120 /_ 0ºA

    IY answer is: 2.31/22.36 and -120º+63.43 = 100 /_ -56.57ºA

    TB answer is: 2.31/31.62 and +120º-18.43º = 70 /_ 101.57ºA

    how come my answer is not same to the picture?

    hope you can help me this question

    thanks...
     
  4. hkra

    Thread Starter Member

    Jul 3, 2005
    18
    0
    i still cannot found the answer. can you teach me the formula?
     
  5. hkra

    Thread Starter Member

    Jul 3, 2005
    18
    0
    in the picture's question and answer come from the sire's book.
    you can get the answer?
     
  6. hkra

    Thread Starter Member

    Jul 3, 2005
    18
    0
    anyhow can you show your answer and formula? maybe it is correct too? thank you
     
  7. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    Like JoeJester, I too got answers different from those shown in the three problems. The magnitudes in the answers I calculated were off by a factor of 10.

    hgmjr
     
  8. hkra

    Thread Starter Member

    Jul 3, 2005
    18
    0
    hgmjr,

    what answer you got from there? can you show me the formula what you did calculated?
     
  9. hkra

    Thread Starter Member

    Jul 3, 2005
    18
    0
    i really need all of yours opinion and suggestion. me too answer was different from the origin.
     
  10. hkra

    Thread Starter Member

    Jul 3, 2005
    18
    0
    no no, those i wrote in the quote is my own answers. i'm not sure it is correct or not

    only answers in the picture below is correct

    your answer close to the picture's answers, it seems you are correct.

    http://tinypic.com/6qfn9s.jpg

    how did you calculated out all of these answer? can you tell me what to press first and later on calculator step by step?
     
  11. hkra

    Thread Starter Member

    Jul 3, 2005
    18
    0
    i try. thank you brother.
     
  12. hkra

    Thread Starter Member

    Jul 3, 2005
    18
    0
    this one my answer same as yours. but what my problem is the answer i did from my sire's question is not same as what sire's answer.

    e.g
    2.31/20 = how much you calculated? what is your answer?
    my answer is 120 but my sire's answer was 11.55

    e.g
    -120º+63.43 = how much you calculated? what is your answer?
    my answer is -56.57º but my sire's answer was -103.43ºA

    you try this 2. i'm confused how come both cannot matches with sire's answers
     
  13. hkra

    Thread Starter Member

    Jul 3, 2005
    18
    0
    sorry my mistaken i never reset the small button on the back of my scientific calculator. i has reset it now the answers came out corrected! thanks you for your informations otherwise i never solved the questions
     
Loading...