Look at the unit circle and apply the hint. The x- and y-coordinates of each point are cosθ and sinθ, respectively. The radius of the unit circle is, of course, 1, and the center point is (0, 0).
General form of the parametric equations for a circle:
x = r·cosθ+h
and
y = r·sinθ+k
where r is the radius and (h, k) is the center. Therefore, the parametric equations for the unit circle are
x = cosθ
and
y = sinθ
:::::
The parametric equations
x = 2cosθ
and
y = 2sinθ
define a circle of radius 2, centered at the origin.
:::::
The parametric equations
x = 4cosθ
and
y = 2sinθ
define a horizontal ellipse centered at the origin, with transverse axis of length 8 and conjugate axis of length 4.
:::::
If a = b then
x = a·cosθ
and
y = b·sinθ
define a circle centered at the origin.
If a > b, then
x = a·cosθ
and
y = b·sinθ
define a horizontal ellipse centered at the origin.
If a < b, If a = b then
x = a·cosθ
and y = b·sinθ
define a vertical ellipse centered at the origin.
No because there can only be a high or low point in the arch of a parabola. The point where the two lines diverge will never meet again to create another point (minimum or maximum) therefore there can only be one maximum or one minimum
Answer:
72°
Step-by-step explanation:
∠ AOB = 20% of 360° = 0.2 × 360° = 72°
arc AB is equal to the angle subtended at the centre , that is
arc AB = 72°
Answer: 2/5
Step-by-step explanation:
slope = change in y/change in x (y2-y1/x2-x1)
slope (using points (50,3) and (60,7)) = 7-3/60-50 = 2/5
Answer:
9
Step-by-step explanation:
Probability is 3/7
that 7 represent all shots and 3 represents successful ones
so,
sarah shots 21 times that means 9 of them would hit the target.