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OpenStudy (anonymous):
help!! gold medal given!! use an identity to solve each equation on the interval [0,2pi] 2cos^2x+sinx-1=0
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OpenStudy (anonymous):
@Directrix
Directrix (directrix):
What is the identity that involes cos^2x. Look at the attached chart.
Directrix (directrix):
@kristinak
OpenStudy (anonymous):
i'm so sorry my computer was acitng up
OpenStudy (anonymous):
@Directrix
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Directrix (directrix):
I'm still waiting for this answer: What is the identity that involes cos^2x. Look at the attached chart.
Directrix (directrix):
It's best to do these trig identities and equations one at the time. Finish the other one and then we can work on this one.
OpenStudy (anonymous):
i did this one already, can you help me in another?
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