Find the phasor form of:
1. i(t) = 10 cos (10t + 63°) + 15 cos (10t − 42°) A .
(Round the final answers to two decimal places and insert ± in the answer field(s), if required.)

Explanation:

A tension or current expressed in cosine form and with a positive sign can be converted directly into a phasor. This is done by indicating the tension and the offset angle:

So:

You can sum the phasors simply using a calculator, however, let's do it manually:

Let's find the rectangular form of each phasor using the next formulas:

For

So:

For

So:

Hence:

Finally:

answer:

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explanation:

answer:

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