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11 April, 13:18

Find the value of x if sin80 = Cos (90-x)

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Answers (2)
  1. 11 April, 14:48
    0
    Answer: 80

    Step-by-step explanation:

    Sin x = cos (90-x)

    Like sin 30 = cos (90-30) = cos 60

    So

    90-x=90-80

    Then

    X=80

    Verify your solution by finding the sum of the angles of sin and cos, it will be 90
  2. 11 April, 15:53
    0
    Step-by-step explanation:

    Sin Ф = Cos (90 - Ф)

    Comparing with this

    Sin 80 = Cos (90 - 80) = Cos 10

    So, x = 80
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