9. -7/12
10. -2.75
11. 1.844
12. 4.539
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).
11 x 9 is 99 so then you do 11 x d and that’s 11d so it would be 99+11d :)
No, it is not. If you see closely, the number 5.2 is not 52. 60 is greater than 5.2.
