Let e = (cos , sin ). Show that e e = cos(
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Let eθ = (cos θ, sin θ). Show that eθ · eψ = cos(θ − ψ) for any two angles θ and ψ.
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First ee is a unit vector since by a trigonometric identity we have lleell Vcos 0 sin 0 1 1 The cos...View the full answer
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