참고 https://www.wolframalpha.com/input?i=solve%28abs%28%E2%88%92sin%28%28%28%CF%80%29%2F%284%29%29%29-%28%28cos%28%28%28%CF%80%29%2F%284%29%29%2Bh%29-cos%28%28%28%CF%80%29%2F%284%29%29%29%29%2F%28h%29%29%29%3C%28%281%29%2F%282%29%29*10%5E%28%E2%88%923%29%2Ch%29
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https://www.wolframalpha.com/input?i=solve%28abs%28%E2%88%92sin%28%28%28%CF%80%29%2F%284%29%29%29-%28%28cos%28%28%28%CF%80%29%2F%284%29%29%2Bh%29-cos%28%28%28%CF%80%29%2F%284%29%29%29%29%2F%28h%29%29%29%3C%28%281%29%2F%282%29%29*10%5E%28%E2%88%923%29%2Ch%29