Find the angle between the vectors √2i + 2j + 2k and i + √2j + √2k.
Let a⇀=2i+2j+2k\overrightharpoon{a}=\sqrt{2}i+2j+2ka=2i+2j+2k and b⇀=i+2j+2k.\overrightharpoon{b}=i+\sqrt{2}j+\sqrt{2}k.b=i+2j+2k.
Now angle between a⇀\overrightharpoon{a}a and b⇀\overrightharpoon{b}b be:
(in case of complex numbers, we need to take the real part of the dot product).
ϕ=acos(1)=0=0o\phi = acos (1) = 0 = 0^oϕ=acos(1)=0=0o
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