Question

1+ Cos²o upon Sin²o =2 Cosec 2 o-1 .prove​

Answer 1

Step-by-step explanation:

$\frac{1 + { \cos }^{2} \alpha }{ \sin ^{2} \alpha } \\ {cosec }^{2} \alpha + \cot^{2} \alpha \\ cosec^{2} \alpha + cosec ^{2} \alpha - 1 \\ 2cosec^{2} - 1$