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           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (408590000÷14.3÷400÷400÷400) ≤2×sin(3.14a)÷3+a{1-sin(2×3.14a)÷(2×3.14a)}×350×1÷400÷0.25 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 408590000 ÷ 14.3 ÷ 400 ÷ 400 ÷ 400 ) ≤2 × sin ( 3.14 * a ) ÷ 3 + a * ( 1 - sin ( 2 × 3.14 * a ) ÷ ( 2 × 3.14 * a ) ) × 350 × 1 ÷ 400 ÷ 0.25         (1)

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    From inequality(1)：
         a ≥ 0.170134

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    The final solution set is :
         a ≥ 0.170134
    *Note: Radian.

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