Answer:
2nd option
Step-by-step explanation:
To convert from (x, y ) → (r, θ )
where
r = ![\sqrt{x^2+y^2}](https://tex.z-dn.net/?f=%5Csqrt%7Bx%5E2%2By%5E2%7D)
θ =
(
)
Here (x, y ) = (- 4, 5 ), a point in the 2nd quadrant
r =
=
= ![\sqrt{41}](https://tex.z-dn.net/?f=%5Csqrt%7B41%7D)
θ =
(
) ≈ 51.3° ← related acute angle , then
θ = 180° - 51.3° = 128.7°
Thus
(- 4, 5 ) → (
, 128.7° ) in polar form
Your answer will be X = 11 over 2, if that's a 2 over 5 in the beginning of the problem
13 cm (approximately)
Step-by-step explanation:
Let the radius of the circle be 'r'.
Area of the circle = πr²
=> 132.7 = (22/7) r²
=> 6.5 ≈ r
Therefore, diameter = 2radius = 2(6.5) = 13 cm
Answer:
x = 18 and x=0
Step-by-step explanation: