Evaluate the following expression. cos870° – sin780º =

Question

Evaluate the following expression.
cos870° – sin780º =

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Thành Đạt 4 years 2021-07-30T09:34:41+00:00 1 Answers 8 views 0

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  1. ngocdiep
    0
    2021-07-30T09:36:38+00:00
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    Answer:

    -sqrt(3)

    Step-by-step explanation:

    Solve each individually

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