-Sum to n terms of the series-sin-sin2-sin2-sin3-sin3-sin4-is equal to-

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Composition of Trigonometric Functions and Inverse Trigonometric Functions

Sum to n term...

Question

Sum to n terms of the series \operatorname{sinθ\operatorname{sin2θ+\operatorname{sin2θ\operatorname{sin3θ+\operatorname{sin3θ\operatorname{sin4θ+...... is equal to

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The sum of n terms of the series whose $n^{t h}$ term is n(n+1) is equal to

S_{n}

n

\frac{1}{2} + \frac{3}{4} + \frac{7}{8} + \frac{15}{16} + . . .

3^{2} + 6^{2} + 9^{2} + 12^{2} + . . .

n

S_{n}

S_{5}

1^{2} + 3^{2} + 5^{2} + \dots

n

1^{2} + 3^{2} + 5^{2} . . . .

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