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`        [cos a / ( cosec a + 1 )] + [cos a / ( cosec a – 1 )]= 2 tan a `
one year ago

```							cos a/(coseca+1)+ cos a/(cosec a-1)=(cos a(cosec a-1)+cos a(cosec a+1))/(cosec^2a-1)=2cos a cosec a/cot^2a=2cos a tan^2a/sin a=2tan^2a/tan a=2tan aHence proved
```
one year ago
```							cos a/(coseca+1)+ cos a/(cosec a-1)↪(cos a(cosec a-1)+cos a(cosec a+1))/(cosec^2a-1)↪2cos a cosec a/cot^2a↪2cos a tan^2a/sin a↪2tan^2a/tan a↪2tan aHence proved
```
one year ago
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