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covens666
@covens666
July 2022
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помогите с тригонометрией,очень срочно!!!
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dimaogol2000
Применим формулу синуса двойного угла:
sin2α = 2•sinα•cosα
5•sin98°/sin49°•sin41° = 5•2•sin49°•cos49°/sin49°•sin41° = 10•cos49°/sin41° = 10•cos(90° - 41°)/sin41° = 10•sin41°/sin41° = 10
ОТВЕТ: 10
1 votes
Thanks 1
dimaogol2000
Если что там градусы.
covens666
и какой ответ?
dimaogol2000
Так 10 ,в конце написано же...
Mihail001192
Verified answer
1 votes
Thanks 1
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Answers & Comments
Применим формулу синуса двойного угла:
sin2α = 2•sinα•cosα
5•sin98°/sin49°•sin41° = 5•2•sin49°•cos49°/sin49°•sin41° = 10•cos49°/sin41° = 10•cos(90° - 41°)/sin41° = 10•sin41°/sin41° = 10
ОТВЕТ: 10
Verified answer