<p>The value of <span>\(\frac{q}{p} + 2\cos\theta\)</span> is</p>
Step-by-Step Solution
Key Concept: Use the relationships derived from the dot product equations with p, q, r.
Step 1: From the solution to Ex. 111, we derived that \(p = r\) and \(2p\cos\theta + q = 0\) . Step 2: Therefore: \(\frac{q}{p} + 2\cos\theta = -2\cos\theta + 2\cos\theta = 0\) ∴ Answer is B .
Correct Answer: B