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OpenStudy (anonymous):
HELP find x: 1+3(cos(x))^2=4sin(pi/2+x)
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OpenStudy (loser66):
manipulate the RHS 4sin(pi/2 +x) = 4cosx replace to get \[1+3cos^2x=4cosx\] \[3cos^2x-4cosx+1=0\] solve as quadratic equation with variable is cos x after getting values of cos x plug back trig to solve for x
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