Multiple Choice Questions on If A 3 5 where 450o lt 540o then cosA 2 is equal to ........ for NDA Exam Preparation

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Multiple Choice Questions

If A 3 5 where 450o lt 540o then cosA 2 is equal to ........

Mathematics (NDA) Trigonometry
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    If A= 3/5 , where 450o < 540o then cosA/2 is equal to?

    \small \frac{1}{\sqrt{10}}

    Correct Answer

    -\sqrt{{\frac{3}{10}}}

    Incorrect Answer

    \small \frac{\sqrt{3}}{\sqrt{10}}

    Incorrect Answer

    None of the above

    Incorrect Answer
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