Question

Find the Cartesian coordinates of the following points (given in polar coordinates). a. ( 2

​
, 4
3π
​
) b. (1,0) c. (0, 3
π
​
) d. (− 2
​
, 4
3π
​
) e. (−3, 6
7π
​
) f. (−10,tan −1
( 3
4
​
)) g. (−1,3π) h. (6 3
​
, 3
2π
​
)

Answer 1

Explanation:

To find the Cartesian coordinates of points given in polar coordinates, we can use the following conversions:

x = r * cos(theta)

y = r * sin(theta)

Let's apply these formulas to each point:

a. (2, 4π/3):

Using the conversion formulas, we have:

x = 2 * cos(4π/3) = 2 * (-1/2) = -1

y = 2 * sin(4π/3) = 2 * (√3/2) = √3

Therefore, the Cartesian coordinates of the point (2, 4π/3) are (-1, √3).

b. (1, 0):

Using the conversion formulas, we have:

x = 1 * cos(0) = 1 * 1 = 1

y = 1 * sin(0) = 1 * 0 = 0

Therefore, the Cartesian coordinates of the point (1, 0) are (1, 0).

c. (0, 3π):

Using the conversion formulas, we have:

x = 0 * cos(3π) = 0 * (-1) = 0

y = 0 * sin(3π) = 0 * 0 = 0

Therefore, the Cartesian coordinates of the point (0, 3π) are (0, 0).

d. (-2, 4π/3):

Using the conversion formulas, we have:

x = -2 * cos(4π/3) = -2 * (-1/2) = 1

y = -2 * sin(4π/3) = -2 * (√3/2) = -√3

Therefore, the Cartesian coordinates of the point (-2, 4π/3) are (1, -√3).