1.

If the position vectors of the vertices A, B and C of DeltaABC are respectively vec(0),-20hat(i)+15hat(j)and36hat(i)+15hat(j), then find the position vector of the incentre of the triangle.

Answer»

`HAT(i)+8hat(J)`
`2HAT(i)+3HAT(j)`
`4hat(i)+3hat(j)`
`2hat(i)-5hat(j)`

ANSWER :A


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