MediumVectors & geometry

Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §11.1 Vectors and Dot Products, #25 · Multivariable Calculus · Vectors & geometry

(b) If … are unit vectors with …, they form a triangle…

(a) If $A$ and $B$ are unit vectors, show that they make equal angles with $A + B$ .

(b) If $A, B, C$ are unit vectors with $A + B + C = 0$ , they form a triangle and the angle between any two is ______.

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §11.1 Vectors and Dot Products, #25

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