If m cos^(2) A + n sin^(2) A = p, then c...

If `m cos^(2) A + n sin^(2) A = p`, then `cot^(2) A`=

`(p+n)/(m+p)`

`(p-n)/(p-m)`

`(p-n)/(m-p)`

`(n+1)/(m+p)`

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