If tan (A + B) = cot 30°, where (A + B) is an acute angle, find the value of (A + B).
Correct: C
We know the complementary angle identity: cot θ = tan (90° - θ). So, cot 30° = tan (90° - 30°) = tan 60°. The given equation becomes tan (A + B) = tan 60°. Since (A + B) is an acute angle, we can equate the angles: A + B = 60°.