What is the Cartesian form of $( -7 , (25pi)/12 )$ ?

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Answer 1 · 2017-04-16T20:19:13

$(-6.761,-1.811)$

Use the parametric form to find the $x$ and $y$ :

$x=rcostheta$

$y=rsintheta$

Plug into these formulas:

$x=-7cos(25pi/12)~~-6.761$

$y=-7sin(25pi/12)~~-1.811$

Now we have $x$ and $y$ . We just need to write them together:

$(-6.761,-1.811)$

What is the Cartesian form of ( -7 , (25pi)/12 ) ( -7 , (25pi)/12 ) ?