Use a sum identity to find the exact value of cos 285.

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Use a sum identity to find the exact value of cos 285.

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Thái Dương 4 years 2021-08-14T00:43:33+00:00 1 Answers 15 views 0

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  1. nguyetanh
    0
    2021-08-14T00:45:32+00:00
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    The exact value of cos 285 is:
    Fraction: (square root of 6 – square root of 2) over 4
    Decimal: 0.25881904…

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )