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Cos2a*cosa. Sin2a cos2a. Cosa cos2a-sin2a sin3a. 4sina+3cosa/3sina-16cosa -2.
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Cosa cos b
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Y cos a b
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Функция a cos x b
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Cos 20 b
%3Dcos3a%5Ccdot%20cos2a-sin3a%5Ccdot%20sin2a%3D%5C%5C%5C%5C%3D(4cos%5E3a-3cosa)(2cos%5E2a-1)-(3sina-4sin%5E3a)%5Ccdot%202%5C%2C%20sina%5Ccdot%20cosa%3D%5C%5C%5C%5C%3D8cos%5E5a-10cos%5E3a%2B3cosa-6sin%5E2a%5Ccdot%20cosa%2B8sin%5E4a%5Ccdot%20cosa%5C%3B%20%3B%5C%5C%5C%5Csin%5E2a%3D1-cos%5E2a%3D1-%5CBig(%5Cdfrac%7B1%7D%7B2%5Csqrt2%7D%5CBig)%5E2%3D1-%5Cdfrac%7B1%7D%7B8%7D%3D%5Cdfrac%7B7%7D%7B8%7D%5C%3B%20%3B%5C%5C%5C%5Csin%5E4a%3D(sin%5E2a)%5E2%3D%5CBig(%5Cdfrac%7B7%7D%7B8%7D%5CBig)%5E2%3D%5Cdfrac%7B49%7D%7B64%7D%5C%3B%20%3B)
Cos2a*cosa. Sin2a cos2a. Cosa cos2a-sin2a sin3a. 4sina+3cosa/3sina-16cosa -2.