Calculate sin 70∘cos 20∘+cosec 36∘sec 54∘−2 cos 43∘ cosec

1.	Calculate sin 70∘cos 20∘+cosec 36∘sec 54∘−2 cos 43∘ cosec 47∘.
Answer» Calculate $\frac{sin 70^{\circ}}{cos 20^{\circ}} + \frac{cosec 36^{\circ}}{sec 54^{\circ}} - 2 cos 43^{\circ} cosec 47^{\circ}$ .

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