Overview: 1 questions will be solved this time.Among them
           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality cos（x/10）大于0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         cos ( x / 10 ) >0         (1)

---

    From inequality(1)：
         -141.371669 < x < -109.955743 或  -78.539816 < x < -47.12389 或  -√24674011/√100000 < x < √24674011/√100000 或  47.12389 < x < 78.539816 或  109.955743 < x < 141.371669

---

    The final solution set is :
         -141.371669 < x < -109.955743 或  -78.539816 < x < -47.12389 或  -√24674011/√100000 < x < √24674011/√100000 或  47.12389 < x < 78.539816 或  109.955743 < x < 141.371669
    *Note: Radian.

Your problem has not been solved here? Please take a look at the  hot problems ！