Let a=7, b=4, c=9 {\a} in a \triangle A B C. Then the values of \sin \frac{A}{2} and \cos A are equal to respectively

Correct Answer is : √613 and 713

\sqrt{\frac{4}{13}} and \frac{9}{13}

\sqrt{\frac{5}{13}} and \frac{8}{13}

\sqrt{\frac{7}{13}} and \frac{6}{13}

\sqrt{\frac{6}{13}} and \frac{7}{13}

CUSAT 2021 BTech Solved Paper Shift 3

Question : 198 of 250

Marks: +1, -0

Let a=7,b=4,c=9a in a △ABC. Then the values of sin‌‌

and cos‌A are equal to respectively

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