Multiple Choice Questions on Consider the following for triangle ABC 1 sin zwnj zwnj B C 2 cos zwnj zwnj A 2 2 tan zwnj zwnj B C ........... for NDA Exam Preparation

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Multiple Choice Questions

Consider the following for triangle ABC 1 sin zwnj zwnj B C 2 cos zwnj zwnj A 2 2 tan zwnj zwnj B C ...........

Mathematics (NDA) Trigonometry
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    Consider the following for triangle ABC:

    1. sin(‌‌(B+C)/2)=cos(‌‌A/2)

    2. tan(‌‌(B+C)/2)=cot(‌‌A/2)

    3. sin(B+C)=cosA

    4. tan(B−C)=−cotA

    Which of the above are correct?

    1 and 3

    Incorrect Answer

    1 and 2

    Correct Answer

    1 and 4

    Incorrect Answer

    2 and 3

    Incorrect Answer
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