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 +  =________ | 30   =________ | 0.48÷0.6=________ |  ﹣ =________ |
 ÷2=________ | 3.5﹣3.05=________ |  ÷  =________ | 7 （  +  ）=________ |
  =________ | 1﹣  =________ |  ÷  =________ | 4﹣  ﹣ =________ |
| 0.25 12=________ |   =________ | 3.27+1.83=________ |  +  + =________ |
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
