Multiple Choice Questions on cos 2 2 cos is always ........ for 11th Standard Preparation

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Multiple Choice Questions

cos 2 2 cos is always ........

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    cos 2\theta+ 2 cos \theta is always

     

    greater than -3/2

    Incorrect Answer

    less than or equal to 3/2

    Incorrect Answer

    greater than or equal to -3/2

    Correct Answer

    None of these 

    Incorrect Answer
    Explanation:

    greater than or equal to -3/2

    By: Swaminath Yadav
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