Matematika

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tolong bantu kerjain tugas matematika saya, please..
tolong bantu kerjain tugas matematika saya, please..

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  • QR² = PR²+PQ²-2 (PR) (PQ) cos P

    28 = 36+16- 2 (6) (4) cos P

    48 Cos P = 52-28

    Cos P = 24/48 = 1/2

    P = 60°

    Sin 60° = 1/2 akar 3

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