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[" 7.If "sin A=(3)/(5),cos B=-(12)/(13),...

[" 7.If "sin A=(3)/(5),cos B=-(12)/(13)," where "A" and "B" both lie in second "],[" quadrant,then the value of "sin(A+B)" is- "],[[" (は) "(56)/(65)," (В) "-(56)/(65)," @ "(65)/(56)," (D "-(65)/(56)]]

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