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

[ 1/1 Equation]
    Work: Find the solution of equation (cos2x)/(cosx) = 50/14 .
    Question type: Equation
    Solution:
    The solution of the equation:
        x₁≈-6.916714 , keep 6 decimal places
        x₂≈-5.391685 , keep 6 decimal places
        x₃≈-4.712389 , keep 6 decimal places
        x₄≈-1.570796 , keep 6 decimal places
        x₅≈-1.406202 , keep 6 decimal places
        x₆≈1.570796 , keep 6 decimal places
        x₇≈1.779683 , keep 6 decimal places
        x₈≈4.200882 , keep 6 decimal places
        x₉≈4.712389 , keep 6 decimal places
        x₁₀≈7.853982 , keep 6 decimal places    
    There are 10 solution(s).    *Note: Radian.

解程的详细方法请参阅：《方程的解法》

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