54) 3tg45° * tg60°

Let's evaluate the expression step by step. First, we need to know the values of the trigonometric functions for the given angles: * tan 45° = 1 * tan 60° = √3 Now, substitute these values into the expression: $$3 \cdot \tan 45^\circ \cdot \tan 60^\circ = 3 \cdot 1 \cdot \sqrt{3}$$ Perform the multiplications: $$= 3 \sqrt{3}$$ So, the result of the expression is 3√3. Answer: $$3\sqrt{3}$$