1.

If tan((pi)/(4)+(y)/(2))=tan^(3)((pi)/(4)+(x)/(2)) then (3+sin^(2)x)/(1+3sin^(2)x)=

Answer»

`(SIN X)/(sin y)`
`(COS x)/(cos y)`
`(cos y)/(cos x)`
`(sin y)/(sin x)`

ANSWER :D


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