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Questions  >>  EAMCET  >>  Mathematics
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Q)

$\cos ^{-1} \bigg(\large\frac{5}{13}\bigg)$$+\cos ^{-1} \bigg(\large\frac{3}{5}\bigg)$$=\cos ^{-1} x=>x=$

\[(a)\;\frac{3}{65} \quad (b)\;\frac{-36}{65} \quad (c)\;\frac{-33}{65} \quad (d)\;-1\]

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