Telescopic sum

General Mathematics
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Tolaso J Kos
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Telescopic sum

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Post by Tolaso J Kos »

Evaluate the sum:

$$\mathcal{S}= \frac{1}{\sin \left ( 45 ^0\right )\sin \left ( 46^0 \right )}+\frac{1}{\sin \left ( 47^0 \right )\left ( \sin 48^0 \right )}+\cdots+\frac{1}{\sin \left ( 133^0 \right )\sin \left ( 134^0 \right )}$$
Imagination is much more important than knowledge.
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