Question:medium

If $|a|=1, |b|=4, a\cdot b = 2$ and $c = 2a \times b - 3b$, then the angle between $b$ and $c$ is

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Use $b \cdot (a \times b) = 0$ directly to simplify vector problems.
Updated On: Apr 23, 2026
  • $\frac{\pi}{6}$
  • $\frac{5\pi}{6}$
  • $\frac{\pi}{3}$
  • $\frac{2\pi}{3}$
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The Correct Option is B

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