The answer is C because when you divide it out you get 6
To solve the problem you must know that to change from Cartesian to polar coordinates you must write:
x = rcos (θ)
Where "r" is the radius
Likewise y = rsin (θ)
Therefore, in the expression r = 3cos (θ) one can write r as:
r = x / cos (θ)
So:
x / cos (θ) = 3cos (θ)
x = 3cos ^ 2 (θ)
The same for y ...
y = rsin (θ)
y = 3cos (θ) sin (θ).
Finally the correct answer is option 2.
x = 3cos ^ 2 (θ) y = 3cos (θ) sin (θ).
Answer:
x = 8√2 units
Step-by-step explanation:
On a 45-45-90 triangle,<em> the ratio between one of the legs </em>(both are congruent)<em> and the hypotenuse is 1 : √2</em> (Improper but it still sends the message). That means the hypotenuse is √2 times as long as a leg.
x = 8 × √2
x = 8√2 units
<h3>Formulae Used :- </h3>
<u>Circumference of Circle :- </u>
<u>Value of π (pi) = </u>
<h2><u>A</u><u>n</u><u>s</u><u>w</u><u>e</u><u>r</u><u> </u><u>:</u><u>-</u><u> </u></h2>
9) C = 2πr = 2 × 3.14 × 4
≈ 25.13274
10) C = 2πr = 2 × 3.14 × 7.2
≈ 45.23893
11) C = 2πr = 2 × 3.14 × 10
≈ 62.83185
12) C = 2πr = 2 × 3.14 × 3.6
≈ 22.61947
13) Given :-
Diameter : 8m
Radius = half of D = 4 cm
⇢C = 2πr = 2 × 3.14 × 4
≈ 25.13274
14) Radius = 6 cm
C = 2πr = 2 × 3.14 × 6
≈ 37.69911
15) C = 2πr = 2 × 3.14 × 7.1
≈ 44.61
16) C=2πr=2× 3.14 × 5.2
≈ 32.6
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