HP 35s HP 35s scientific calculator - User Guide - Page 155
Angle between vectors, ACOSA
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Presses for dot product ,and the dot product of two vectors is 28 Angle between vectors The angle between two vectors, A and B, can be found as θ = ACOS(A B/ A B ) Find the angle between two vectors: A=[1,0],B=[0,1] Keys: Display: Description: 9 9 3 Switches to ALG mode Sets Degrees mode Arc cosine function Enters vector A [1,0] Õ 3 3 3 Enters vector B [0,1] for dot product of A and B Finds the magnitude of vector A [1,0] Finds the magnitude of vector B [0,1] The angle between two vectors is 90 Find the angle between two vectors: A=[3,4],B=[0,5] Keys: 9 9 3 3 3 Display: Description: Switches to RPN mode Sets Degrees mode Finds the dot product of two vectors Finds the magnitude of vector [3,4] Vector Arithmetic 10-5