2、at all cost表示“不惜任何代价，无论如何”，它的用法比at any cost更为普遍；cost原属于 不及物动词，但是为了方便，不出现及物动词加 间接宾语 再加状语宾语的特殊结构，习惯上将cost. Sec、csc、cot的三角函数公式是secx=1/ (cosx)、cscx=1/ (sinx)、cotx=1/ (tanx)= (cosx)/ (sinx)。三角函数是基本初等函数之一，是以角度为自变量，角度对应任意角终边与单位圆交点坐标或. Cost，spend，take用法区别 这三个均可表示“花费”，但在用法和搭配等有很大区别。现分述如下： 一、从所涉及的主语来看 cost的主语通常是事或物（包括 形式主语 it），不.
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