Multiple Choice Questions on Evaluate the following cos 36 deg A cos 36 deg minus A cos 54 deg A cos 54 deg minus A ........ for SSC CGL Exam Preparation

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Multiple Choice Questions

Evaluate the following cos 36 deg A cos 36 deg minus A cos 54 deg A cos 54 deg minus A ........

Quantitative Aptitude (CGL) Trignometry
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    Evaluate the following: cos(36° + A).cos(36° − A) + cos(54° + A).cos(54° − A) 

    This questions was previously asked in
    Combined Graduate level Examination 2023 Tier I
    View All ssc Previous Year Papers

     sin 2A 

    Incorrect Answer

    cos A 

    Incorrect Answer

    sin A 

    Incorrect Answer

    cos 2A

    Correct Answer
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    Explanation:

    cos 2A

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