SOLUTION: Point A is found at (-3, -3). Find the cos at that point. A.) √2/2 B.) - 2√/2 C.) √3/3 D.) - √3/3

Algebra ->  Test -> SOLUTION: Point A is found at (-3, -3). Find the cos at that point. A.) √2/2 B.) - 2√/2 C.) √3/3 D.) - √3/3       Log On


   

Question 1059927: Point A is found at (-3, -3). Find the cos at that point.
A.) √2/2
B.) - 2√/2
C.) √3/3
D.) - √3/3
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Point A is found at (-3, -3). Find the cos at that point.
-----
cos = x/r
----
Since r = sqrt[3^2+3^2] = 3*sqrt(2)
------------------------------------
Ans: cos(t) = -3/(3sqrt(2)) = -1/sqrt(2) = -sqrt(2)/2
-----------------------
Cheers,
Stan H.
---------------
A.) √2/2
B.) - 2√/2
C.) √3/3
D.) - √3/3