示例：反三角函数

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示例：反三角函数

使用反三角函数获得各个三角函数的值 (单位为弧度)。

1. 以符号形式计算函数 sin 和 cos。

2. 使用返回值，以符号形式计算函数 acos 和 asin。

返回值单位为弧度。

3. 数值形式计算相同的函数。

4. 使用不同值，重复函数 cot、acot、sec、asec、csc 和 acsc 之间的这种比较。

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反三角函数

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