What is the Cartesian form of #(-21,(81pi) /12)#?

Answer 1

This is not a correct point in polar coordinates. See explanation.

The given pair does NOT represent a valid point in polar coordinates. According to the definition the first coordinate is a distance between the point and the origin, therfore it cannot be a negative number.

If a correct point #(r,varphi)# was given, then to calculate the Cartesian coordinates you would have to use:
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Answer 2

The Cartesian form of the given polar coordinates (-21, (81π)/12) is (21√3/2, 0).

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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