Jika a dan b sudut lancip, cos (a-b)=1/2 akar(3), dan cos a
Saluran Edukasion 2024-04-26T14:56:43
Jika a dan b sudut lancip, cos (a-b)=1/2 akar(3), dan cos a cos b=1/2, nilai cos (a+b)/cos (a-b)= ....
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