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  1. #1

    trigonometry question

    Which of the following is the value of given that ?


    (A)

    (B)

    (C)

    (D)


    Thanks!

  2. #2
    We know that .

    So,

    From the following trigonometric identity


    we can find the value of





    Therefore the correct answer is (A).

  3. #3
    Thanks Nicole!

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