AprblmInTrigo

Level pending

If

\(\biggl(\sin\alpha \sec ^{ 2 }{ \frac { \alpha }{ 2 } } =l\biggr)\) and \(\left( 1+\tan { \frac { \alpha }{ 2 } } -\sec { \frac { \alpha }{ 2 } } \right) \left( 1+\tan { \frac { \alpha }{ 2 } } +\sec { \frac { \alpha }{ 2 } } \right) =Cl\)

Find \(C\)

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