Multiple Choice Questions on What is the value of sin 90o 2A 4 ndash cos2 90o ndash 2A ........ for SSC CGL Exam Preparation

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Multiple Choice Questions

What is the value of sin 90o 2A 4 ndash cos2 90o ndash 2A ........

Quantitative Aptitude (CGL) Trignometry
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     What is the value of sin (90o + 2A)[4 – cos2 (90o – 2A)]?

    2(cos3 A – sin3 A)

    Incorrect Answer

    2(cos3 A + sin3 A)

    Incorrect Answer

    4(cos6 A+ sin6 A)

    Incorrect Answer

    4(cos6 A – sin6 A)

    Correct Answer
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    Explanation:

    Sin(90+2a)[4-cos(90-2a)]
    =cos 2a [4- sin 2a] 
    =4(cos6 A – sin6 A)

    By: MIRZA SADDAM HUSSAIN
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