1.

Consider the system of equations x cos ^(3) y + 3 x cosy sin^(2) y = 14 t o (1) and x sin^(3) y + 3 x cos^(2) y sin y = 13 to (2) The value of sin^(2) y + 2 cos^(2) yis

Answer»

`(4)/(5)`
`(9)/(5)`
2
3

Answer :B


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