Problem 51-4 Source: Problem elaborated by the author of the site.
Be the phasors
Solution of the Problem 51-4
Using method cosines law
As the phasor
By performing the calculation, we find:
Extracting the square root:
By performing the calculation, we find:
Then to find the
The
Using Complex Notation Method
Using complex notation, the phasors of polar notation are initially transformed into rectangular notation. Like this:
Adding real part with real part and imaginary part with imaginary part, results:
By both methods the same values are found. Note that the latter method requires fewer calculations and in addition, the angle provided is the angle of the resulting phasor with the horizontal.