Question: for some angles a, B. y. Prove that for any UER that 7 = ||} (cos(a) = cos(3)] + cos(y)k)

for some angles a, B. y. Prove that for any UER that

for some angles a, B. y. Prove that for any UER that 7 = ||} (cos(a) = cos(3)] + cos(y)k)

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