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If (cosα + isinα) is a root of the equation ax^2 + bx + c = 0, a, b, c ∈ R, then

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in Quadratic Equations by (53.3k points)

If (cosα + isinα) is a root of the equation ax2 + bx + c = 0, a, b, c ∈ R, then

a. a cos2α + bsinα + c = 0

b. a cos2α + bcosα + c + 0

c. a sin 2α + bsin α + c = 0

d. none of these

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1 Answer

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by (53.6k points)

Correct option is b. a cos2α + bcosα + c + 0

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