УПРОСТИТЕ ВЫРАЖЕНИЕ:2cos^2a+2sin^2a+tg*ctg
=(cos2a/2sin2a+ctg2a)+tg2a=(1/2ctga+ctga)+tga=3ctga/2+1/ctga=3ctg^2a+2/ctga
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=(cos2a/2sin2a+ctg2a)+tg2a=(1/2ctga+ctga)+tga=3ctga/2+1/ctga=3ctg^2a+2/ctga