Math Chapter Wise Functional Analysis And Measure Theory English MCQ UP PCS (Pre) 2001 Q.The series: A2 n n=1 n=1 π sin and cos are both 2n 2 convergent ∞ ∞ ∑ ∑ B2 n n=1 n=1 π sin and cos are both 2n 2 divergent ∞ ∞ ∑ ∑ C2 n=1 n n=1 π sin is divergent and 2n π cos is convergent 2 ∞ ∑ D2 n=1 π sin is convergent and 2n ∞ ∑ n n=1 π cos is divergent 2 ∞ ∑ Show answer Correct answer: 2 n=1 π sin is convergent and 2n ∞ ∑ n n=1 π cos is divergent 2 ∞ ∑