Multiple Choice Questions on What is sin4 theta minus cos4 theta equal to for any real number theta ........ for CDS Exam Preparation

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Multiple Choice Questions

What is sin4 theta minus cos4 theta equal to for any real number theta ........

Quantitative Aptitude (CDS) Trignometry
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    What is sin4θ− cos4θ equal to for any real number θ?

     

    1

    Incorrect Answer

    1− 2sin2θ

    Incorrect Answer

    2cos2θ

    Incorrect Answer

    1 - 2cos2θ

    Correct Answer
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    Explanation:

    Sin4θ - cos4θ = (sin2θ - cos2θ) * (sin2θ + cos2θ) = - cos2θ *1 = 1- 2cos2θ

    By: Munesh Kumari
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