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rimma4345555555
@rimma4345555555
July 2022
1
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Помогите, пожалуйста, срочно !!!!!!!!!!!!!!!!!!!!!!!!!!!! Упростите выражения :
1)sinacosa(cos^2a-sin^2a)
2)sin4a/cos^4a-sin^4a
3)sin(пи/4-а)cos(пи/4-а)
4)sin^2(b-45°)-cos^2(b-45°)
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