Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §11.2 Planes and Projections, #17 · Multivariable Calculus · Vectors & geometry

(angle between planes) Find the cosine of the angle between … and…

(angle between planes) Find the cosine of the angle between $x + 2 y + 2 z = 0$ and (a) $x + 2 z = 0$ (b) $x + 2 z = 5$ (c) $x = 0$ .

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §11.2 Planes and Projections, #17

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