### Home > PC > Chapter 10 > Lesson 10.1.3 > Problem 10-39

10-39.

Find **r** in component form if is the standard angle.

and Draw each vector in a circle. Then make a right triangle with the

-axis.Circle, radius in first quadrant, labeled 5, is hypotenuse in right triangle where horizontal leg is part of x axis, central angle of triangle labeled 1 sixth pi = 30 degrees.

Solve the rest of the triangle.

Note: Each part forms a special right triangle.Labels added, horizontal leg, 5 halves times square root of 3, vertical leg, 5 halves.

and and