= (1/16)[sin(arctan(3/4) -sin(arctan(0)]

arctan(3/4).

opp side = 3

adj side = 4

So,

hypotenuse = 5

And so,

sin(arctan(3/4)) = opp/hyp = 3/5

arctan(0).

opp side = 0

adj side = 1

So,

hypotenuse = 1 -----actually, no hypotenuse.

And so,

sin(arctan(0)) = opp/"hyp" = 0/1 = 0 -----this is only for comparison.

Of course, if tan(tetha) = 0, then theta = 0

And sin(0) = 0 also.

Hence,

= (1/16)[3/5 -0]

= 3/80