Question

Find R and theta with the coordinates (-3,7).

Answer 1

"R" is the distance from the origin to the point.

R = √(-3² + 7²)

R = √(9 + 49)

R = √(58)

R = 7.62

tangent (Θ) = 7 / -3

Θ = arctan (7 / -3)

Θ = 113.2° counterclockwise from the x-axis