{"id":217864,"date":"2023-12-23T01:32:27","date_gmt":"2023-12-22T17:32:27","guid":{"rendered":"https:\/\/www.idc.net\/help\/217864\/"},"modified":"2023-12-23T01:32:27","modified_gmt":"2023-12-22T17:32:27","slug":"php%e5%87%bd%e6%95%b0%ef%bc%9aatan","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/217864\/","title":{"rendered":"PHP\u51fd\u6570\uff1aatan"},"content":{"rendered":"<p><title id=\"php%e5%87%bd%e6%95%b0%ef%bc%9aatan-gHjORKnujV\">PHP\u51fd\u6570\uff1aatan<\/title><\/p>\n<h1 id=\"php%e5%87%bd%e6%95%b0%ef%bc%9aatan-gHjORKnujV\">PHP\u51fd\u6570\uff1aatan<\/h1>\n<p>\u5728PHP\u4e2d\uff0catan()\u51fd\u6570\u662f\u4e00\u4e2a\u7528\u4e8e\u8ba1\u7b97\u53cd\u6b63\u5207\u7684\u6570\u5b66\u51fd\u6570\u3002\u5b83\u8fd4\u56de\u4e00\u4e2a\u4ecb\u4e8e -\u03c0\/2 \u5230 \u03c0\/2 \u5f27\u5ea6\u4e4b\u95f4\u7684\u89d2\u5ea6\u503c\u3002<\/p>\n<h2 id=\"%e8%af%ad%e6%b3%95-gHjORKnujV\">\u8bed\u6cd5<\/h2>\n<p>atan(x)<\/p>\n<h2 id=\"%e5%8f%82%e6%95%b0-gHjORKnujV\">\u53c2\u6570<\/h2>\n<p>x\uff1a\u5fc5\u9700\uff0c\u8868\u793a\u4e00\u4e2a\u6570\u5b57\uff0c\u7528\u4e8e\u8ba1\u7b97\u53cd\u6b63\u5207\u3002<\/p>\n<h2 id=\"%e8%bf%94%e5%9b%9e%e5%80%bc-gHjORKnujV\">\u8fd4\u56de\u503c<\/h2>\n<p>atan()\u51fd\u6570\u8fd4\u56de\u4e00\u4e2a\u4ecb\u4e8e -\u03c0\/2 \u5230 \u03c0\/2 \u5f27\u5ea6\u4e4b\u95f4\u7684\u89d2\u5ea6\u503c\u3002\u5982\u679cx\u662f\u975e\u6570\u503c\u6216\u65e0\u7a77\u5927\uff0c\u51fd\u6570\u5c06\u8fd4\u56deNaN\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b-gHjORKnujV\">\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528atan()\u51fd\u6570\u7684\u793a\u4f8b\uff1a<\/p>\n<pre>\n&lt;?php\necho &quot;atan(1) = &quot; . atan(1) . &quot;<br>\"; \/\/ \u8fd4\u56de 0.78539816339745\necho \"atan(0) = \" . atan(0) . \"<br>\"; \/\/ \u8fd4\u56de 0\necho \"atan(-1) = \" . atan(-1) . \"<br>\"; \/\/ \u8fd4\u56de -0.78539816339745\n?&gt;\n<\/pre>\n<h2 id=\"%e5%ba%94%e7%94%a8%e5%9c%ba%e6%99%af-gHjORKnujV\">\u5e94\u7528\u573a\u666f<\/h2>\n<p>atan()\u51fd\u6570\u5728\u5f88\u591a\u6570\u5b66\u548c\u51e0\u4f55\u8ba1\u7b97\u4e2d\u90fd\u6709\u5e7f\u6cdb\u7684\u5e94\u7528\u3002\u5b83\u53ef\u4ee5\u7528\u4e8e\u8ba1\u7b97\u4e24\u4e2a\u5750\u6807\u70b9\u4e4b\u95f4\u7684\u89d2\u5ea6\uff0c\u6216\u8005\u7528\u4e8e\u8ba1\u7b97\u4e09\u89d2\u5f62\u7684\u89d2\u5ea6\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5047\u8bbe\u6709\u4e00\u4e2a\u76f4\u89d2\u4e09\u89d2\u5f62\uff0c\u5df2\u77e5\u4e24\u6761\u8fb9\u7684\u957f\u5ea6\u5206\u522b\u4e3aa\u548cb\uff0c\u53ef\u4ee5\u4f7f\u7528atan()\u51fd\u6570\u6765\u8ba1\u7b97\u659c\u8fb9\u4e0e\u5176\u4e2d\u4e00\u4e2a\u76f4\u89d2\u8fb9\u4e4b\u95f4\u7684\u89d2\u5ea6\u3002<\/p>\n<pre>\n\n<\/pre>\n<p>\u4ee5\u4e0a\u4ee3\u7801\u5c06\u8f93\u51fa\uff1a<\/p>\n<p>\u659c\u8fb9\u4e0e\u76f4\u89d2\u8fb9\u7684\u89d2\u5ea6\u4e3a\uff1a36.869897645844\u5ea6<\/p>\n<h2 id=\"%e6%80%bb%e7%bb%93-gHjORKnujV\">\u603b\u7ed3<\/h2>\n<p>PHP\u7684atan()\u51fd\u6570\u662f\u4e00\u4e2a\u7528\u4e8e\u8ba1\u7b97\u53cd\u6b63\u5207\u7684\u6570\u5b66\u51fd\u6570\u3002\u5b83\u8fd4\u56de\u4e00\u4e2a\u4ecb\u4e8e -\u03c0\/2 \u5230 \u03c0\/2 \u5f27\u5ea6\u4e4b\u95f4\u7684\u89d2\u5ea6\u503c\u3002\u5728\u6570\u5b66\u548c\u51e0\u4f55\u8ba1\u7b97\u4e2d\uff0catan()\u51fd\u6570\u6709\u5e7f\u6cdb\u7684\u5e94\u7528\uff0c\u53ef\u4ee5\u7528\u4e8e\u8ba1\u7b97\u89d2\u5ea6\u3001\u4e09\u89d2\u5f62\u7b49\u3002<\/p>\n<h2 id=\"%e9%a6%99%e6%b8%af%e6%9c%8d%e5%8a%a1%e5%99%a8%e9%a6%96%e9%80%89%e5%90%8e%e6%b5%aa%e4%ba%91-gHjORKnujV\">\u9999\u6e2f\u670d\u52a1\u5668\u9996\u9009\u540e\u6d6a\u4e91<\/h2>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5bfb\u627e\u53ef\u9760\u7684\u9999\u6e2f\u670d\u52a1\u5668\u63d0\u4f9b\u5546\uff0c\u540e\u6d6a\u4e91\u662f\u60a8\u7684\u9996\u9009\u3002\u6211\u4eec\u63d0\u4f9b\u9ad8\u6027\u80fd\u7684\u9999\u6e2f\u670d\u52a1\u5668\uff0c\u786e\u4fdd\u60a8\u7684\u7f51\u7ad9\u548c\u5e94\u7528\u7a0b\u5e8f\u80fd\u591f\u5feb\u901f\u3001\u7a33\u5b9a\u5730\u8fd0\u884c\u3002\u8bf7\u8bbf\u95ee\u6211\u4eec\u7684<a href=\"https:\/\/idc.net\">\u5b98\u7f51<\/a>\u4e86\u89e3\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PHP\u51fd\u6570\uff1aatan PHP\u51fd\u6570\uff1aatan \u5728PHP\u4e2d\uff0catan()\u51fd\u6570\u662f\u4e00\u4e2a\u7528\u4e8e\u8ba1\u7b97\u53cd\u6b63\u5207\u7684\u6570\u5b66\u51fd\u6570\u3002\u5b83\u8fd4\u56de [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[197851],"tags":[],"class_list":["post-217864","post","type-post","status-publish","format-standard","hentry","category-php"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217864","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=217864"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217864\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=217864"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=217864"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=217864"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}