✨ Best Answer ✨
2cosa=sina
(2cosa)^2+(2sina)^2=(sina)^2+(2sina)^2=5(sina)^2=4
sina>0よりsina=2/√5
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✨ Best Answer ✨
2cosa=sina
(2cosa)^2+(2sina)^2=(sina)^2+(2sina)^2=5(sina)^2=4
sina>0よりsina=2/√5
Users viewing this question
are also looking at these questions 😉
ありがとうございます。わかりました。