1.

If \(|\vec P \times \vec Q|\) =\(|\vec P . \vec Q|\) then angle between \(\vec P\)and \(\vec Q\) then angle between P and Q will be -(a) 0° (b) 30° c) 45° (d) 60°

Answer»

(c) 45°

\(|\vec P \times \vec Q|\) = \(|\vec P . \vec Q|\) Expand the terms

PQ sinθ = PQ cos θ

tan θ = 1 

θ = 45°



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