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Trigonometry 11 Online
OpenStudy (anonymous):

3+3sin(theta)=2cos^2theta

OpenStudy (anonymous):

Are you solving for theta?

OpenStudy (anonymous):

Use the inequality cos^2theta + sin^2theta = 1 to substitute and create an equation with only sines/cosines.

OpenStudy (anonymous):

In this case, it would be easiest to replace cos^2 theta with 1 - sin^2theta

OpenStudy (anonymous):

Then you can solve it with the quadratic formula

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