Multiple Choice Questions on The value of tan 4 deg tan 43 deg tan 47 deg tan 86 deg is ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

The value of tan 4 deg tan 43 deg tan 47 deg tan 86 deg is ........

Quantitative Aptitude ( CCS) Trignometry
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    The value of tan 4° . tan 43° . tan 47° . tan 86° is

    2

    Incorrect Answer

    3

    Incorrect Answer

    1

    Correct Answer

    4

    Incorrect Answer
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    Explanation:

    tan 4° . tan 43° . tan 47° . tan 86°
    = tan 4° . tan 43° . tan (90° – 43°) . tan (90° – 4°)
    = tan 4° . tan 43° . cot 43° . cot 4°
    [? tan (90° – Θ) = cot Θ & tan Θ . cot Θ = 1]
    = 1

    By: Amit Kumar
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