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Introduction to Trigonometry Test - 13

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Introduction to Trigonometry Test - 13
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  • Question 1
    1 / -0

    If A and B are acute angles such that sin A = cos B then (A + B) = ?

    Solution

    sin A = cos B

    cos (90° - A) = cos B   [sin A = cos (90° - A)]

    90° - A = B

    90° = A + B

    A + B = 90°

     

  • Question 2
    1 / -0

    If 2 sin 3x = √3. The value of x is

    Solution

    We have,

    2 sin 3x = √3

    sin 3x = √32

    sin 3x = sin 60°

    3x = 60°

    x = 60°/3

    x = 20°

     

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