What is the Cartesian form of $(-4,(-19pi)/4))$ ?

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Answer 1 · 2018-02-27T11:44:55

(2.8, 2.8)

To turn polar coordinates into Cartesian form we use the following formulas: $(x,y)$

$x= rcosx$

$y=rsinx$

In the polar coordinates $r$ = -4, and $x$ = $-(19pi)/4$

Then, we insert these values into the formulas:

$x= -4cos(-(19pi)/4) = 2.8$

$y= -4sin(-(19pi)/4)= 2.8$

Therefore, the coordinates in Cartesian form is : $(2.8,2.8)$

What is the Cartesian form of (-4,(-19pi)/4))(-4,(-19pi)/4))?