1.

Find the radius of the circle escribed to the triangle ABC (Shown in the figure below) on the side BC ifangleNAB=30^(@), angleBAC=30^(@), AB=AC=5.

Answer»

`((10sqrt(2)+5sqrt(3)-5)(2-SQRT(3)))/(2sqrt(2))`
`((10sqrt(2)+5sqrt(3)+5))/(2sqrt(2))(2-sqrt(3))`
`((10sqrt(2)+5sqrt(3)-5))/(2sqrt(2))(2+sqrt(3))`
`((10sqrt(2)+5sqrt(2)+1))/(2sqrt(3))(sqrt(3)-1)`

Answer :A


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