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arinaryys00
@arinaryys00
June 2023
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РЕШИТЕ ПОЖАЛУЙСТА СРОЧНО НУЖНО!!!!!!!!!
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zmeura1204
Ответ:
ВС=21ед
Решение:
Тригонометрическое тождество:
sin²∠A+cos²∠A=1
sin∠A=√(1-cos²∠A)=
=√(1-(24/25)²)=
=√(625/625-576/625)=
√(49/625)=7/25.
sin∠A=BC/AB
BC=AB*sin∠A=75*7/25=21 ед
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Answers & Comments
ВС=21ед
Решение:
Тригонометрическое тождество:
sin²∠A+cos²∠A=1
sin∠A=√(1-cos²∠A)=
=√(1-(24/25)²)=
=√(625/625-576/625)=
√(49/625)=7/25.
sin∠A=BC/AB
BC=AB*sin∠A=75*7/25=21 ед