1.

If sin x + "cosec"x + tan y + cot y = 4 where x and y in (0,(pi)/2) tan"" (y)/2 is a root of the equation

Answer»

`alpha^2+2alpha+1=0`
`alpha^2+2alpha-1=0`
`2alpha^2-2alpha-1=0`
`alpha^2-alpha-1=0`

ANSWER :B


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