Multiple Choice Questions on If A tan 11 deg tan 29 deg B 2 cot 61 deg cot 79 deg then ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

If A tan 11 deg tan 29 deg B 2 cot 61 deg cot 79 deg then ........

Quantitative Aptitude ( CCS) Trignometry
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    If A = tan 11° tan 29°, B = 2 cot 61° cot 79°, then :

    A = 2B

    Incorrect Answer

    A = – 2B

    Incorrect Answer

    2A = B

    Correct Answer

    2A = – B

    Incorrect Answer
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    Explanation:

    Given, A = tan 11° tan 29°
    And, B = 2 cot 61° cot 79°
    Or, B = 2 tan 29° tan 11° = 2A
    [?  cot (90° – Θ) = tan Θ]
    So, 2A = B.

    By: Amit Kumar
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