BISC 121Lg Lecture 3: Lecture 3 Notes Math
Document Summary
Addition: use the tip to tail method. Multiplication by -1: flip the vector so that it goes the exact opposite way with the same starting point. Multiplication by any number (scalar), x: if the scalar is positive: Multiply the length of the vector by the scalar: if the scalar is negative: Multiply the length of the vector by the absolute value of the scalar, and. Subtraction then multiply that by -1: multiply the vector being subtracted by -1 and then add that to the preexisting vector. Definition: a unit vector is a vector u with magnitude 1. Definition: if the vector u = Then the vector u multiplied by the scalar a = Ex) a = (cid:2869) (cid:2871)(cid:2868) and the vector u = Remark: if a = (xa, ya, za) and b = (xb, yb, zb)
