lekepius9178 lekepius9178

08-02-2024
Mathematics

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If a, b ,and c are there mutually perpendicular unit vectors and d is a unit vector which makes equal angles with a, b ,and c, then find the value of ∣a+b+c+d∣²
A. 4+2√2
B. 4+2√3
C. 2+√5
D. 3+√5

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