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Find the direction cosines and angles of u and show that cos2α + cos2β + cos2γ = 1. (Round your answers for the angles to four decimal places.) u = −4i + 3j + 9k cosα = α ≈ rad cosβ = β ≈ rad cosγ = γ ≈ rad

Find the direction cosines and angles of u and show that cos2α + cos2β + cos2γ = 1. (Round your answers for the angles to four decimal places.) u = −4i + 3j + 9k cosα = α ≈ rad cosβ = β ≈ rad cosγ = γ ≈ rad

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Find the direction cosines and angles of u and show that cos 2 ⁡ α + cos 2 ⁡ β + cos 2 ⁡ γ = 1 . (Round your answers for the angles to four decimal places.)
u = − 4 i + 3 j + 9 k
cos ⁡ α =
⇒ α ≈
rad
cos ⁡ β =
⇒ β ≈
rad
cos ⁡ γ =
⇒ γ ≈
rad

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