R=4 because 20-4 = 16 and 4 times 4 = 16
X = 25
a^2 + b^2 = c^2
19^2 +16^ = c^2
617 = c^2
(Square root 617)
x=24.83
x=25
Answer:
Xmin:
-10
Xmax:
10
Ymin:
-10
Ymax
10
Step-by-step explanation:
Answer:
Absolute maximum is 2
Absolute minimum at -2
Step-by-step explanation:
The given parametric functions are:

By the chain rule:


At fixed points, 

This gives
on 
This implies that the extreme points are
and 
By eliminating the parameter, we have 
This is a circle with radius 2, centered at the origin.
Hence (0,2) is an absolute maximum ,at
and (0,-2) is an absolute minimum at 