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    Question

    Find the maximum value of 20 sin A + 9 cos

    A.
    A √481 Correct Answer Incorrect Answer
    B √490 Correct Answer Incorrect Answer
    C √475 Correct Answer Incorrect Answer
    D √465 Correct Answer Incorrect Answer

    Solution

    Maximum value of a sin A + b cos A = √(a² + b²)
    Here, a = 20 and b = 9
    Required value = √(20² + 9²) = √(400 + 81) = √481

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