函数y=sin1/3x的最小正周期T=2π/(1/3)=6π
当1/3x=2kπ+π/2(K ∈ Z)时,即x=6kπ+3π/2(K ∈ Z)时取得最大值,是1;
当1/3x=2kπ-π/2(K ∈ Z)时,即x=6kπ-3π/2(K ∈ Z)时取得最小值,是-1.
函数y=sin1/3x的最小正周期T=2π/(1/3)=6π
当1/3x=2kπ+π/2(K ∈ Z)时,即x=6kπ+3π/2(K ∈ Z)时取得最大值,是1;
当1/3x=2kπ-π/2(K ∈ Z)时,即x=6kπ-3π/2(K ∈ Z)时取得最小值,是-1.