3.3: Solving Trig Equations using Identities

Question

Solve for the approximate solutions in the interval $[0, 2 π) .$ List your answers separated by a comma, round to two decimal places. If it has no real solutions, enter DNE.

$2 \cos^{2} (θ) + 2 \cos (θ) - 1 = 0$

Paul M. · Accepted Answer

The substitution cos 2θ = 2 cos2θ - 1 produces a quadratic in cos θ which can be solved exactly.

3.3: Solving Trig Equations using Identities

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3.3: Solving Trig Equations using Identities

1 Expert Answer

Still looking for help? Get the right answer, fast.

OR

RELATED TOPICS

RELATED QUESTIONS

tan^2x-sin^2x=tan^2xsin^2x

I need help trying to sole tan^2 x =1 where x is more than or equal to 0 but x is less than or equal to pi

find all solutions to the equation in (0, 2pi) sin(6x)+sin(2x)=0

(2sin18)(cos18)

how do i go about solving a trig identity; that simplify s 1-sin^2 theta/1-cos theta

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