Question:medium

Let a, b, c be non-coplanar unit vectors equally inclined to one another at an acute angle θ. Then | a+ b+ c| in terms of θ is equal to

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Use | u+ v|²=| u|²+| v|²+2 u· v.

Updated On: Mar 19, 2026

(1+cosθ)√(cos 2θ)
(1+cosθ)√(1-2cosθ)
(1-cosθ)√(1+2cosθ)
None of these

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The Correct Option is D

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