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[" (ii) Find the sum of n terms of "12+1...

[" (ii) Find the sum of n terms of "12+100" + "100" " "10" ."],[" Show that "sin^(2)(x+alpha)+sin^(2)(n+beta)-2cos(alpha+beta)],[quad sin(x+alpha)sin(x+beta)" is independent of "x],[" if "cos alpha=(x)/(-)quad cos beta-y]

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