Question: In Exercises 1 and 2, use the figure, which shows two lines whose equations are y1 = m1x + b1 and y2 = m2x +

In Exercises 1 and 2, use the figure, which shows two lines whose equations are y1 = m1x + b1 and y2 = m2x + b2. Assume that both lines have positive slopes. Derive a formula for the angle between the two lines. Then use your formula to find the angle between the given pair of lines.

1. y = x and y = ˆš3x
2. y = x and y x / ˆš3

| - + b 9. 2 4 |2 + bz 4.

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