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Exercise 1.2.17

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$\cos α = 1 ∕ \sqrt{2}, \cos β = 0, \cos γ = - 1 ∕ \sqrt{2} .$ For any vector $v = (v_{1}, v_{2}, v_{3})$ the cosines with $(1, 0, 0)$ and $(0, 0, 1)$ are $\cos^{2} α + \cos^{2} β + \cos^{2} γ = (v_{1}^{2} + v_{2}^{2} + v_{3}^{2}) ∕ ∥ v ∥^{2} = 1$

mathchakra

2021-11-20 14:06

Exercise 1.2.17

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