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[" Q.8If "tan((alpha)/(2))" and "tan((be...

[" Q.8If "tan((alpha)/(2))" and "tan((beta)/(2))" are the roots of the "],[" equation "8x^(2)-26x+15=0" then "cos(alpha+beta)" is "],[" equal to- "],[[" (A) "-(627)/(725)," (B) "(627)/(725)],[" (C) "-(725)/(627)," (D) "-1]]

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