Mathematics
Senior High

この四角6の(4)の途中式を教えてください!!
ちなみに答えはθ=0、4/3π<θ<2π です。

0=2く2zxのとき、次の不等式を解け。 (1) sinの< -和を ⑫) cos9>0 ⑬ cs(9 に 1 > (④ -V3sinの+cos9 1

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