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  • 2021 December(E23) Math Question 58

    Trigonometry

    - Pythagorean Theorem & sin cos tan

    The law of sines & The law of cosines
    Choice K

    $$ a^2=b^2+c^2-2bccosA $$

    $$ 15^2=16^2+17^2-2(16)(17)cosA $$

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