At their point of intersection, the 0 between any two nonparallel lines satisfies the relationship (m2 – m1) cos 0 = sin0 + m¡m2sin0 where m, and m2 represent the slopes of the two lines. Rewrite the equation in terms of a single trigonometric function. 7 a. Find the angle between the lines Y, = x- 3 and Y, = x- 1. b. Find the angle between the lines Y, = 3x – 1 and Y, = -2x + 7. %3D 3 %3D %3D

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