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यदि sin A = $\frac{4}{5}$ तथा sin B = $\frac{5}{13}$ है, तो cosec (A - B) = ?

1
$\frac{65}{33}$
2
$\frac{65}{63}$
3
$\frac{65}{16}$
4
$\frac{65}{56}$

Answer:- 1

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