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8922875
@8922875
August 2022
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sin4 x/2 — cos4 x/2 =0,25. Решите пожалуйста срочно !
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tseluyko58
Verified answer
(sin^2 x/2-cos^2 x/2)*(sin^2x/2 +cos^2 x/2) =0,25
- cos x = 0,25
cos x = -0,25
x = +- arccos(- 0,25) +2pin
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Answers & Comments
Verified answer
(sin^2 x/2-cos^2 x/2)*(sin^2x/2 +cos^2 x/2) =0,25- cos x = 0,25
cos x = -0,25
x = +- arccos(- 0,25) +2pin