请问这两题怎么写?高二数学
1个回答
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2kπ+2π/3<12=5π/(-3,π/12)=(3;π 仅k=0 对应点为(√2,13π/12)
夹角=13π/12-π/4=10π/3) 或(-√2,2kπ+π+2π/:可以是(√2,2kπ+2π/3)
满足-π<6
距离=2×3×sin(5π/12)=6×sin(75°)=6(sin45°cos30°+cos45°sin30°)
=6(√6+√2)/4=3(√6+√2)/2
第二题,2π/3)
满足-π<2kπ+5π/3<π 仅k=-1 对应点为(-√2,-π/
夹角=13π/12-π/4=10π/3) 或(-√2,2kπ+π+2π/:可以是(√2,2kπ+2π/3)
满足-π<6
距离=2×3×sin(5π/12)=6×sin(75°)=6(sin45°cos30°+cos45°sin30°)
=6(√6+√2)/4=3(√6+√2)/2
第二题,2π/3)
满足-π<2kπ+5π/3<π 仅k=-1 对应点为(-√2,-π/
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