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Suggested: prove that cos2x+cos 2(x+π/3)+cos 2(x-π/3)=3/2 - cos2x cos x/2-cos3x cos9x/2 - integration of cos2x-cos 2 alpha/cos x-cos alpha - lim 1-cos2x/x^2 - (d^2-4d+4)y=e^2x+cos2x - solve (d^2+2d+2)y=e^-2x+cos2x - cos2x=cos2x-sin2x - (d3-7d^2+14d-8)y=e^x cos2x - (d^2-4d+3)y=e^x cos2x - (d^2-4d+4)y=x^2+e^x+cos2x - lim x tends to pi/2 1+cos2x/(pi-2x)^2 - prove cos2x=cos^2x-sin^2x - cos2x=1-2sin^2x - integrate cos2x+2sin^2x/cos^2x - 2x+cos2x Browse related:
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