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    Question

    Find the maximum value of 20 sin A + 9 cos

    A.
    A тИЪ481 Correct Answer Incorrect Answer
    B тИЪ490 Correct Answer Incorrect Answer
    C тИЪ475 Correct Answer Incorrect Answer
    D тИЪ465 Correct Answer Incorrect Answer

    Solution

    Maximum value of a sin A + b cos A = тИЪ(a┬▓ + b┬▓)
    Here, a = 20 and b = 9
    Required value = тИЪ(20┬▓ + 9┬▓) = тИЪ(400 + 81) = тИЪ481

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