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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
