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4cos^2x+4cosx-1=0
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what is (2cosx+1-sqrt2)(2cos+1+sqrt2)
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Factor
4cos^2x+4cosx-1=0
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find all solutions of the equation 4cos^2x-4cosx+1=0
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f(x)=4sinx/1+cosx
find f'(x) this is what i got and i dunno what i did to get it wrong (4cos(x)+ 4cosx^2-4sin(x)^2)/cosx62
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Use the Quadratic Formula to solve the equation in the interval [0,2pi). Then use a graphing utility to approximate the angle x.
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