Multiple Choice Questions on If tan 5x 10 deg cot 5y 20 deg the value of x y is ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

If tan 5x 10 deg cot 5y 20 deg the value of x y is ........

Quantitative Aptitude ( CCS) Trignometry
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    If tan (5x -10°) = cot (5y + 20°) the value of (x+y) is

    10°

    Incorrect Answer

    16°

    Correct Answer

    15°

    Incorrect Answer

    14°

    Incorrect Answer
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    Explanation:

    Tan (5x-10°) = tan {90°-(5y +20°)}
    5x-10°=70°-5y
    5x +5y =80°
    ∴x + y = 16°

    By: MIRZA SADDAM HUSSAIN
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