[" 39.If "B,A+B" are acute angles,"sin(A...

[" 39.If "B,A+B" are acute angles,"sin(A+B)=(12)/(13),sin B=(5)/(13)" then "sin A=],[[" 1) "-(119)/(4)," (2) "(119)/(160)," 3) "(169)/(119)," 4) "(-169)/(119)]]

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