Prove: (1 + csc x)/sec x - cot x = cos x

The identity `(1 + csc x)/sec x - cot x = cos x` has to be proved. `(1 + csc x)/sec x - cot x` => `(1 + 1/sin x)/(1/cos x) - (cos x)/(sin x)` => `(cos x + cos x/sin x) - (cos x)/(sin x)` => `cos x + cos x/sin x - (cos x)/(sin x)` => `cos x` This proves that `(1 + csc x)/sec x - cot x = cos x`

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Prove: (1 + csc x)/sec x - cot x = cos x

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justaguide | College Teacher | (Level 2) Distinguished Educator

Posted on June 4, 2012 at 7:27 PM

The identity `(1 + csc x)/sec x - cot x = cos x` has to be proved.

`(1 + csc x)/sec x - cot x`

=> `(1 + 1/sin x)/(1/cos x) - (cos x)/(sin x)`

=> `(cos x + cos x/sin x) - (cos x)/(sin x)`

=> `cos x + cos x/sin x - (cos x)/(sin x)`

=> `cos x`

This proves that `(1 + csc x)/sec x - cot x = cos x`

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Prove: (1 + csc x)/sec x - cot x = cos x

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