Multiple Choice Questions on What is the simplified value of cosec 2A cot 2A ........ for SSC CGL Exam Preparation

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Multiple Choice Questions

What is the simplified value of cosec 2A cot 2A ........

Quantitative Aptitude (CGL) Trignometry
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    What is the simplified value of cosec 2A + cot 2A?

    sec A

    Incorrect Answer

    sec (A/2)

    Incorrect Answer

    cot A

    Correct Answer

    cot2 A

    Incorrect Answer
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    Explanation:

    Cosec2A+cot2A
    =1/sin2A+ 1/tan2A
    =1/sin2A+ cos2A/sin2A
    = (1+cos2A)/sin2A
    =(1 + 2cos^2A -1)/sin2A
    =(2cos^2A)/sin2A
    = (2.cosA.cosA)/2.sinA.cosA
    =cosA/sinA
    =cotA

    By: MIRZA SADDAM HUSSAIN
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