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    Question

    Find the difference between angle and its complement if

    the angle is one-half of its complement.
    A 20° Correct Answer Incorrect Answer
    B 24° Correct Answer Incorrect Answer
    C 30° Correct Answer Incorrect Answer
    D 36° Correct Answer Incorrect Answer

    Solution

    Let the angle be 'A'.

    Complement of 'A' = 90° - A

    So, 'A' = (1/2) X (90° - A)

    Or, 2A = 90° - A

    Or, 3A = 90°

    Or, 'A' = 30°

    Complement of 'A' = 90° - 30° = 60°

    Required difference = 60° - 30° = 30°

    Hence, option c.

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