Find the exact value by using a half-angle identity. (6 points) cosine of negative pi divided by eight one half times the

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Find the exact value by using a half-angle identity. (6 points)
cosine of negative pi divided by eight

one half times the square root of quantity two minus square root of two
one half times the square root of quantity one minus square root of two
one half times the square root of quantity two plus square root of two
one half times the square root of quantity one plus square root of two

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Nick 3 days 2021-07-19T16:55:43+00:00 1 Answers 0 views 0

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    2021-07-19T16:56:49+00:00

    Answer:

    c

    Step-by-step explanation:

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