SOLUTION: What is {{{ cos(t) }}}if {{{ t }}} corresponds to the point (-2, 0)? A.) {{{ 0 }}} B.) {{{ 1 }}} C.) {{{ -1 }}} D.) Undefined.

Question 1058523: What is if corresponds to the point (-2, 0)?
A.)
B.)
C.)
D.) Undefined.
Answer by Edwin McCravy(20056) (Show Source): You can put this solution on YOUR website!

The angle indicated by the red arc is 180� or p radians.



But the right triangle is "smashed" flat against the x-axis,
so its hypotenuse coincides with its horizontal side, and
its vertical side is 0. 

The adjacent side is the x coordinate of the point -2.
The hypotenuse r, is the radius vector which coincides 
with the green line.  Since hypotenuse or radius vector
is always taken positive, its value is +2



Edwin

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