Physics · WORK, ENERGY AND POWER

In the vector representation shown in the figure, vector \( \mathbf{B} \) is inclined at an angle \( \theta \) to vector \( \mathbf{A} \). Which expression correctly gives the scalar product \( \mathbf{A} \cdot \mathbf{B} \) in terms of the components and projections illustrated?

1. A
   \( A (B \cos\theta) = B (A \cos\theta) \)
2. B
   \( B (A \tan\theta) \)
3. C
   \( \frac{A}{B \cos\theta} \)
4. D
   \( A (B \sin\theta) \)