32 results authored by David Rickard - search across all users.
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Question in David's workspace
Finding the modulus and argument (in radians) of four complex numbers; the arguments between −π and π and careful with quadrants!
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Question in David's workspace
Solve for x and y: a1x+b1y=c1a2x+b2y=c2
The included video describes a more direct method of solving when, for example, one of the equations gives a variable directly in terms of the other variable.