Value Tan
1. The problem is to find the value of $ (1 + \tan A)(1 + \tan B)$ where $A = 40^\circ$ and $B = 5^\circ$.
2. Substitute the given values:
$$ (1 + \tan 40^\circ)(1 + \tan 5^\circ) $$
3. Calculate $\tan 40^\circ$ and $\tan 5^\circ$ approximately:
$$ \tan 40^\circ \approx 0.8391 $$
$$ \tan 5^\circ \approx 0.0875 $$
4. Substitute the approximate values:
$$ (1 + 0.8391)(1 + 0.0875) = 1.8391 \times 1.0875 $$
5. Multiply:
$$ 1.8391 \times 1.0875 \approx 2.000 $$
6. So the value of $(1 + \tan 40^\circ)(1 + \tan 5^\circ)$ is approximately 2.
7. Checking the options, the correct answer is (B) 2.