\left. \begin{array} { l } { \operatorname { sin } A = \frac { 1 } { 1 – InterviewSolution

1.	\left. \begin{array} { l } { \operatorname { sin } A = \frac { 1 } { 11 } } \\ { \operatorname { cos } B = \frac { 12 } { 13 } } \end{array} \right.
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