Multiple Choice Questions on Evaluate the given trignometric equation 7cos2 theta 3sin2 q 4 ........ for NDA Exam Preparation

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Multiple Choice Questions

Evaluate the given trignometric equation 7cos2 theta 3sin2 q 4 ........

Mathematics (NDA) Trigonometry
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    Evaluate the given trignometric equation  7cos2 θ+ 3sin2 q =4 ?

    q =nπ± π/3.

    Incorrect Answer

    q =2nπ± π/4.

    Incorrect Answer

    q =2nπ± π/2.

    Incorrect Answer

    q =2nπ± π/3.

    Correct Answer
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    Explanation:

    7cos2 θ+ 3sin2 q  =4

    7(1-sin2 θ) +3sin2 q=4

    7-4sin2 q =4

    -4sin2 q   = -3

    sin2 q =3/4

     sin q =√3  /2    

    q =2nπ± π/3.

    By: bhavesh kumar singh
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