關於sin cos tan cot sec csc的評價， 史丹福狂想曲
［Just for fun] Find the minimum value of |sin x + cos x + tan x + cot x + sec x + csc x| 😛 ...
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［Just for fun] Find the minimum value of |sin x + cos x + tan x + cot x + sec x + csc x| 😛 ...
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