To solve this expression, we need to use the trigonometric identity:
sin(a) cos(a) = 1/2 sin(2a)
Therefore, we have:
28sin(20) cos(20) = 28(1/2 sin(40)) = 14sin(40)
Now, we need to divide by sin(40):
(14sin(40)) / sin(40) = 14
Therefore, the expression simplifies to 14.
To solve this expression, we need to use the trigonometric identity:
sin(a) cos(a) = 1/2 sin(2a)
Therefore, we have:
28sin(20) cos(20) = 28(1/2 sin(40)) = 14sin(40)
Now, we need to divide by sin(40):
(14sin(40)) / sin(40) = 14
Therefore, the expression simplifies to 14.