If 7 sin ^(2) x + 3 cos ^(2) x =4, 0 lt ...

If `7 sin ^(2) x + 3 cos ^(2) x =4, 0 lt x lt 90^(@),` then what is the value of tan x ?

A

`sqrt2`

B

1

C

`(sqrt3)/(2)`

D

`(1)/(sqrt3)`

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