- 初三三角函数锐角 30°、60°、45° 的 cos、tan、sin 速记技巧，并且不会错的？ - 知乎
知乎，中文互联网高质量的问答社区和创作者聚集的原创内容平台，于 2011 年 1 月正式上线，以「让人们更好的分享知识、经验和见解，找到自己的解答」为品牌使命。知乎凭借认真、专业、友善的社区氛围、独特的产品机制以及结构化和易获得的优质内容，聚集了中文互联网科技、商业、影视
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Similarly, if I enter =cos(30), the number returned is 154251 I had expected 5000 in the first case and 8660 in the second If you read the help page for SIN and COS, you will see that their argument is radians, not degrees So try: =SIN(RADIANS(30)) =COS(RADIANS(30))
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