Ответ:
8/17
Объяснение:
sin(α/2)=±√((1-cosα)/2)
0<α<π/2⇒0<α/2<π/4⇒sin(α/2)>0⇒sin(α/2)=√((1-cosα)/2)=√((1-161/289)/2)=√(64/289)=8/17
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Answers & Comments
Ответ:
8/17
Объяснение:
sin(α/2)=±√((1-cosα)/2)
0<α<π/2⇒0<α/2<π/4⇒sin(α/2)>0⇒sin(α/2)=√((1-cosα)/2)=√((1-161/289)/2)=√(64/289)=8/17