Mathematics
Senior High
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tの範囲がこうなるのが分かりません。教えてください

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✨ Best Answer ✨

0≦θ<2π
2倍して 0≦2θ<4π
π/6を足すと、 π/6≦2θ+π/6<4π+π/6
よって π/6≦t<4π+π/6

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