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Докажите тождество cos 4a-sin 4a /cos^2a+2tg^2a=1cos^2a. Упростить 2-sin2a-cos2a. Cos4a+cos2a*sin2a-sin4a упростить. Sin2a cos2a+sin4a/sin2a cos2a+cos4a-1.
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Дано sin a cos a b
B c bo co
E f b co
Cos t b 5
A sin x b cos x c
Cos pi b
Cos a b 2sin a sin b
Cos a b cosb
N m cos b
A cos b x c d
%3D%5C%5C%5C%5C%3D%5Cfrac%7B(cos%5E22a-sin%5E22a)(cos%5E22a%2Bsin%5E22a)%7D%7Bcos4a%7D-(cos2a-sin2a)%3D%5C%5C%5C%5C%3D%5Cfrac%7Bcos4a%5Ccdot%201%7D%7Bcos4a%7D-(cos2a-sin2a)%3D1-cos2a%2Bsin2a%3D(1-cos2a)%2Bsin2a%3D%5C%5C%5C%5C%3D2sin%5E2a%2B2sina%5Ccdot%20cosa%3D2sina(sina%2Bcosa)%3D2sina%5Ccdot%5Csqrt2sin(a-%5Cfrac%7B%5Cpi%7D%7B4%7D)%3D%5C%5C%5C%5C%3D2%5Csqrt2%5Ccdot%20sina%5Ccdot%20sin(a-%5Cfrac%7B%5Cpi%7D%7B4%7D))
Докажите тождество cos 4a-sin 4a /cos^2a+2tg^2a=1cos^2a. Упростить 2-sin2a-cos2a. Cos4a+cos2a*sin2a-sin4a упростить. Sin2a cos2a+sin4a/sin2a cos2a+cos4a-1.