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11th Class Mathematics Sample Paper Mathematics Sample Paper-5

  • question_answer
    A, B, C are angles of a triangle, such that \[{{\sin }^{2}}A+{{\sin }^{2}}B+{{\sin }^{2}}C=\] constant, find \[\frac{dA}{dB}\]

    A)  \[\frac{\sin A}{\sin (2A+B)}\]

    B)  \[\frac{-\operatorname{sinB}}{\sin (2A+B)}\]

    C) \[\frac{cosB}{\sin (2A+B)}\]

    D)  \[\frac{-cosB}{\sin (2A+B)}\]

    Correct Answer: B

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