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? asked in Science & MathematicsMathematics · 6 years ago

Need help with adding and subtracting in polar form?

Let a= cos(2pi(2/7)) + isin(2pi(2/7))

b= cos(2pi(3/7)) + isin(2pi(3/7))

Find a+b and a-b

Any help would be greatly appreciated!

1 Answer

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  • Mrs.Zee
    6 years ago
    Favorite Answer

    a+b = 2cos(pi(5/7)) cos(pi(1/7)) + 2 I sin(pi(5/7)) cos(pi(1/7))

    a-b = -2 sin(pi(5/7)) sin(pi(-1/7)) + 2 I cos(pi(5/7)) sin(pi(-1/7))

    Source(s): my brain Socrates Tutoring
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