Mathematics
Senior High
7行目からの書き方教えてください
どういう風に読み取ればいいのか分からなくて😱
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6 } YUUYY****まさん
2018/2/1 16:08
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sin9+cos6=1// 3
両辺二乗
sin^26+cos^26+2sin9cos6=1/3
1+2sin9cos9=1/3
2sin9cos0=1/3-1=-2/3
Sin9cos9=-1/3
tan9+1/tan9=sin9/cos9+cos6/sin9
=(sin^26+cos^26)/sin9cos6=1/sin9cos9
=(-03)=-3・・・答
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