Cos 45*sin 40

To evaluate \(\cos 45^\circ \times \sin 40^\circ\):

1. \(\cos 45^\circ = \frac{\sqrt{2}}{2} \approx 0.7071\)
2. \(\sin 40^\circ \approx 0.6428\)

Now, multiply:

\[ 0.7071 \times 0.6428 \approx 0.4549 \]

Final answer: approximately 0.455