Koordinat Cartesius dan Koordinat Kutub

10 September 09

duritajam.web.id. Ehm.. ndak susah kok kalo kalian mau sedikit aja meluangkan waktu untuk menggambar dan sekaligus menanamkan konsep. Ketika kalian memperoleh materi tentang koordinat cartesius dan kordinat kutub dan disuguhi dengan beberapa rumus, sangat mungkin kalian jadi bingung dangan rumus tersebut. Saya sih punya sedikit tips untuk kalian..
Tipsnya adalah menggambar ! itu saja:
Coba kalian perhatikan dua gambar dibawah ini:
kartesius

kutub
Dua gambar tersebut menunjukkan titik yang sama tetapi posisinya disebut dengan cara yang berbeda. Gambar yang pertama adalah dengan koordinat cartesius dan yang kedua dalah dengan koordinat kutub. Dan masing-masing bisa saling dihubungkan, :)
Pertama, jika diketahui sebuah titik [pmath]A(x_1,y_1)[/pmath] maka bisa dinyatakan dalam koordinat kutub dengan cara:

  1. Kalian harus tw konsep tentang phytagoras, maka [pmath]r=sqrt{x^2+y^2}[/pmath] kalo ndak bisa kebangetan
  2. Masih ingat kan konsep trigonometri pada segitiga siku-siku? yup, [pmath]tan alpha={y_1/x_1}[/pmath] jadi [pmath]alpha=tan^-1({y_1/x_1})[/pmath]
  3. Jadi sekarang kita bisa mengkonversi dari koordinat cartesius ke koordinat kutub,

Gimana kalo sebaliknya? dicoba ya masak ndak bisa?

24 Balasan untuk “Koordinat Cartesius dan Koordinat Kutub”

  1. prabowo mengatakan:

    terus gunanya sma kehiduan sehari hari apa mas..??..

  2. ijunk mengatakan:

    kurang lengkap masss…..
    contoh soalnya mana ???

  3. dzul fikri mengatakan:

    contohnya mana

  4. elvin mengatakan:

    seru nih klo semua tentang matematika bahasa nya kyk gini… cepet ngertiiiii :D

  5. aprilia mengatakan:

    1 p (2,2akar3)
    ini bagaimana cara mengubahnya dari koordinat cartesius mnjadi koordinat kutub

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