Multiple Choice Questions on What is the value of 1 ndash sin 90 ndash 2A 1 sin 90 2A ........ for SSC CGL Exam Preparation

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Multiple Choice Questions

What is the value of 1 ndash sin 90 ndash 2A 1 sin 90 2A ........

Quantitative Aptitude (CGL) Trignometry
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    What is the value of [1 – sin (90 – 2A)] / [1 + sin (90 + 2A)]?

    sinA cosA

    Incorrect Answer

    cot2A

    Incorrect Answer

    tan2A

    Correct Answer

    sin2A cosA

    Incorrect Answer
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    Explanation:

    1- sin (90-2a)] / [1+sin(90+2a)]
    =( 1-cos 2a ) / (1+cos 2a)
    = 2sin²a / 2cos² a
    = tan²a

    By: MIRZA SADDAM HUSSAIN
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