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[65.," tan "alpha" and "tan beta" are th...

[65.," tan "alpha" and "tan beta" are the roots of the equation "],[x^(2)+ax+b=a" then the value of "],[sin^(2)(alpha+beta)+a sin(alpha+beta)cos(alpha+beta)],[,+b cos^(2)(alpha+beta)" is equal to "],[[" (a) "b" a "," (b) "a," (c) "b^(2)a," (d) "b]]

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