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Let \hata and \hatb be two unit vectors such that the angle between them is π/4. If θ is the angle between the vectors (\hata+\hatb) and (\hata+2 \hatb+2(\hata * \hatb)), then the value of 164 \,\cos ^2 θ is equal to : | Watch the step-by-step video solution for this NIMCET PYQ.