sinα=1/2(a-1),求a得取值范围
问题描述:
sinα=1/2(a-1),求a得取值范围
答
-1≤sinα=1/2(a-1)≤1
-2≤(a-1)≤2
-1≤a≤3
sinα=1/2(a-1),求a得取值范围
-1≤sinα=1/2(a-1)≤1
-2≤(a-1)≤2
-1≤a≤3