56) 12 sin 60° * cos 60°

Let's evaluate the expression step by step. First, we need to know the values of the trigonometric functions for the given angles: * sin 60° = √3/2 * cos 60° = 1/2 Now, substitute these values into the expression: $$12 \cdot \sin 60^\circ \cdot \cos 60^\circ = 12 \cdot \frac{\sqrt{3}}{2} \cdot \frac{1}{2}$$ Perform the multiplications: $$= 12 \cdot \frac{\sqrt{3}}{4}$$ $$= \frac{12\sqrt{3}}{4}$$ $$= 3\sqrt{3}$$ So, the result of the expression is $$3\sqrt{3}$$. Answer: $$3\sqrt{3}$$