JosueMendez2303 JosueMendez2303

10-03-2021
Mathematics

contestada

Find all solutions to the equation.
cos^2x + 2 cos x + 1 = 0 (4 points)

Find all solutions to the equation cos2x 2 cos x 1 0 4 points class=

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mayabhattarai826 mayabhattarai826

10-03-2021

Answer:

cos^2x + (1+1)cos x + 1 = 0

or,cos^2x + cos x + cos x + 1 = 0

or,cos x(cos x + 1) + 1 (cos x + 1) = 0

or, (cosx + 1) + (cosx + 1) = 0

either

cosx + 1 =0 or cosx +1 =0

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