Matematika

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Tolong jawab, yg jawab didoain pahalanya berlipat-lipat.
aminn
Tolong jawab, yg jawab didoain pahalanya berlipat-lipat. aminn

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1 Jawaban

  • 22. a) BC² = AB² + AC² - 2AC . cos A
    = 2² + 3² - 2.2.3 . cos 60
    = 4 + 9 - 12 . 1/2
    = 7

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