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Heya
____________________________
Sin x / Cos x { 1 - Sin x / Cos x }
- Cos x / Sin x { 1 - Cos x / Sin x }
=>
{Sin x / Cos x - Sin x } + {Cos x / Cos x - Sinx }
=>
Sin x + Cos x
____________
Cos x - Sin x
Hence, proved
____________________________
Sin x / Cos x { 1 - Sin x / Cos x }
- Cos x / Sin x { 1 - Cos x / Sin x }
=>
{Sin x / Cos x - Sin x } + {Cos x / Cos x - Sinx }
=>
Sin x + Cos x
____________
Cos x - Sin x
Hence, proved
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