1.

Let f_(n)(theta) = ("cos"(theta)/(2)+ cos 2 theta + "cos" (7 theta)/(2)+....+ cos (3n - 2) (theta)/(2))/("sin"(theta)/(2) + sin 2 theta + "sin" (7 theta)/(2) +....+sin (3n - 2) (theta)/(2)). Then match the entries of column-I with their corresponding values given in column-II. {:(,"Column-I",,"Column-II"),((A),f_(3) ((3pi)/(16)),(p),2 - sqrt(3)),((B),f_(5) ((pi)/(28)),(q),sqrt(3 + 2sqrt(2))),((C),f_(7) ((pi)/(60)),(r),sqrt(2) - 1),(,,(s),2 + sqrt(3)):}

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ANSWER :A - R; B - Q; C - s


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