New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    If Sin 3A = Cos (A - 46°) where 3A is acute angle,

    then the Value of A is
    A 56° Correct Answer Incorrect Answer
    B 44° Correct Answer Incorrect Answer
    C 46° Correct Answer Incorrect Answer
    D 34° Correct Answer Incorrect Answer

    Solution

    Sin 3A = Cos (A - 46°) Sin 3A = Sin [90° -(A - 46°)] 3A = 90° - A + 46° 4A = 136° A = 34°

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