Let a, b, ybe the angles made by a vector u e r^3 with positive r, y, z-axis respectively. then, the numbers cos a, m = cos cos are called the direction cosines of u. (a) find the formulas for the direction cosines: 1,m, n of the vector u (u1, u2, u3) (b) prove that 12 m2 n2 = 1. (c) find the direction cosines l, m, n of the vector u (1-,1)

step-by-step explanation:

134.6 us dollars

step-by-step explanation:

1 us dollar = 1.33 canadian dollars

so, 150 us dollars = 150 × 1.33 = $199.5.

in canada, the money mitchell spent = 20 canadian dollars.

remaining canadian dollars with him = 199.5 - 20 = 179.5.

after mitchell returned to us, he exchanged the remaining canadian dollars to us dollars.

179.5 canadian dollars = 179.5 × 0.75 = 134.6 us dollars.