1.

If cosec x -cot x = a, then find the value of cosx.

Answer»

`(1-a^(2))/(1+a^(2))`
`(a^(2)-1)/(a^(2)+1)`
`(a-1)/(a^(2)+1)`
`(a^(2)-1)/(a+1)`

ANSWER :B


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