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Back to Lecture Thumbnails saphirasnow

Is the presence of exponentiation relevant here besides an easy way to do multiplication for magnitudes and addition for angles? (i.e. does the use of e as the constant for exponentiation matter for the purposes of these calculations?) spookyspider

Are there cases where the rotation matrices on the left are better suited to a graphics problem than the polar coordinates on the right? It seems like the right equations are much simpler as you mentioned, but could there still be uses for the left equations? YutianW

Looks like e^(i * theta) has two meaning: it either represents a vector with length 1 that rotates theta CCW from x axis, or it means the operation of rotating a vector theta CCW from it current position while maintaining its length. BlueCat

How does complex number calculations get evaluated in computers? richardnnn

Another way to prove 2D rotations communicate right? Concurrensee

About precision, is complex computation has more precision than matrix form? coolpotato

Suppose we do perform a 2D rotation using complex numbers, how would we revert back so that we get a vector with real components? yingsi

Is there an advantage of using one coordinate system over the other? Murrowow

How does our computer use complex coordinates to perform calculations? I'd imagine it would be rather "expensive" to implement so is there a significantly greater benefit for doing so? ddkim

Are polar coordinates the reason why the complex system is so nice for 2D?