Question

Q17 answer please now

Answer 1

1/2*AB*AC*Sin A

Now, Area of trianlge ABC = Area of ADB + Area ADC

=> (1/2) * AB * AC * sinA = (1/2) * AB * AD * Sin(A/2) + (1/2) * AC * AD * Sin(A/2).

=>12 sin60° = 4*AD*sin30° + 3*AD*sin30°

=> 12√3/2= (7/2)*AD.

Hence, AD = 12√3/7.




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