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

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

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    From inequality(1)：
         x ≤ -4712389/250000 或  -4712389/250000 ≤ x ≤ -12566371/1000000 或  -12566371/1000000 ≤ x ≤ -12566371/1000000 或  -12566371/1000000 ≤ x ≤ -3141593/500000 或  -3141593/500000 ≤ x ≤ -3141593/500000 或  -3141593/500000 ≤ x ≤ 0 或  0 ≤ x ≤ 0 或  0 ≤ x ≤ 1256637/200000 或  1256637/200000 ≤ x ≤ 1256637/200000 或  1256637/200000 ≤ x ≤ 1256637/100000 或  x ≥ 1256637/100000

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    The final solution set is :
         x ≤ -4712389/250000 或  -4712389/250000 ≤ x ≤ -12566371/1000000 或  -12566371/1000000 ≤ x ≤ -12566371/1000000 或  -12566371/1000000 ≤ x ≤ -3141593/500000 或  -3141593/500000 ≤ x ≤ -3141593/500000 或  -3141593/500000 ≤ x ≤ 0 或  0 ≤ x ≤ 0 或  0 ≤ x ≤ 1256637/200000 或  1256637/200000 ≤ x ≤ 1256637/200000 或  1256637/200000 ≤ x ≤ 1256637/100000 或  x ≥ 1256637/100000
    *Note: Radian.

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