37º和53º的sin,cos,tan,cot
sin cos tan cot \u4e4b\u95f4\u7684\u5173\u7cfb\u4e09\u89d2\u51fd\u6570\u7684\u5316\u7b80\u6c42\u503c\u4e5f\u662f\u4e2d\u8003\u7684\u5e38\u8003\u70b9\uff0csin\u3001cos\u3001tan\u3001cot\u662f\u5565\uff1f
\u201csin\u5bf9cos\u8bf4\u6211\u4eec\u4eca\u665a\u662ftan\u5462\uff1f\u8fd8\u662fcot\u5462\uff1f\u201d\u6307\u7684\u662f\u4e09\u89d2\u51fd\u6570\u7684\u5e94\u7528\uff1b
sin\uff08\u03b1\uff0b\u03b2\uff0b\u03b3\uff09\uff1dsin\u03b1\u00b7cos\u03b2\u00b7cos\u03b3\uff0bcos\u03b1\u00b7sin\u03b2\u00b7cos\u03b3\uff0bcos\u03b1\u00b7cos\u03b2\u00b7sin\u03b3\uff0dsin\u03b1\u00b7sin\u03b2\u00b7sin\u03b3
cos\uff08\u03b1\uff0b\u03b2\uff0b\u03b3\uff09\uff1dcos\u03b1\u00b7cos\u03b2\u00b7cos\u03b3\uff0dcos\u03b1\u00b7sin\u03b2\u00b7sin\u03b3\uff0dsin\u03b1\u00b7cos\u03b2\u00b7sin\u03b3\uff0dsin\u03b1\u00b7sin\u03b2\u00b7cos\u03b3
tan\uff08\u03b1\uff0b\u03b2\uff0b\u03b3\uff09\uff1d\uff08tan\u03b1\uff0btan\u03b2\uff0btan\u03b3\uff0dtan\u03b1\u00b7tan\u03b2\u00b7tan\u03b3\uff09\u00f7\uff081\uff0dtan\u03b1\u00b7tan\u03b2\uff0dtan\u03b2\u00b7tan\u03b3\uff0dtan\u03b3\u00b7tan\u03b1\uff09
\u6269\u5c55\u8d44\u6599\uff1a
\u5728K\uff0f2\u7684\u60c5\u51b5\u4e0b\uff0c\u5982\u679cK\u662f\u5076\u6570\uff0c\u51fd\u6570\u540d\u4e0d\u53d8\uff0c\u5982\u679cK\u662f\u5947\u6570\uff0c\u51fd\u6570\u540d\u76f8\u53cd\u3002\u770b\u770b\u8c61\u9650\u4e2d\u7684\u7b26\u53f7\u5728\u51fd\u6570\u4e2d\u3002\u8fd9\u91cc\u6709\u4e00\u4e2a\u52a0\u53f7\u548c\u51cf\u53f7\u7684\u516c\u5f0f\uff1b1\uff0c\u90fd\u662f\u6b63\u7684\uff0c\u4e24\u4e2asin\uff0c32\uff0c\u56db\u4e2acos\uff0c\u6240\u4ee5\u7b2c\u4e00\u8c61\u9650\u90fd\u662f\u6b63\u7684\uff0c\u7b2c\u4e8c\u8c61\u9650\u7684\u89d2\u90fd\u662f\u6b63\u7684\uff0csin\u662f\u6b63\u7684\uff0c\u7b2c\u4e09\u8c61\u9650\uff0c\u6b63\u5207\u548c\u4f59\u5207\u90fd\u662f\u6b63\u7684\uff0c\u7b2c\u56db\u8c61\u9650\uff0ccos\u662f\u6b63\u7684\u3002
\u6216\u8005\u7b80\u79f0\u4e3aASTC\uff0c\uff02all\uff02\uff02sin\uff02\uff02tan\uff0bcot\uff02\u548c\uff02cos\uff02\u90fd\u662f\u6b63\u7684\u3002\u4e5f\u53ef\u4ee5\u7b80\u5199\u4e3a\uff0c\u53f3\u6b63\u5207\u9664\u4ee5\u6b63\u5f26\u53f3\u6b63\u5207\u9664\u4ee5\u4f59\u5207\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u6b63\u7684\u6b63\u5f26\u5728x\u8f74\u4e0a\u65b9\uff0c\u6b63\u7684\u4f59\u5f26\u5728y\u8f74\u53f3\u4fa7\uff0c\u6b63\u7684\u6b63\u5207\u9664\u4ee5\u4f59\u5207\u662f\u503e\u659c\u7684\u3002
\u4f8b\u5982\uff1a90\u5ea6\uff0balpha\u3002\u4e3b\u683c\uff1a90\u5ea6\u662f90\u5ea6\u7684\u5947\u6570\u500d\uff0c\u6545\u53d6\u8865\u51fd\u6570\uff1b\u6807\u8bb0\uff1a\u5982\u679c\u662f\u9510\u89d2\uff0c\u521990\u5ea6\uff0b\u662f\u7b2c\u4e8c\u8c61\u9650\u7684\u89d2\uff0c\u7b2c\u4e8c\u8c61\u9650\u7684\u6b63\u5f26\u4e3a\u6b63\uff0c\u4f59\u5f26\u4e3a\u8d1f\u3002\u6240\u4ee5sin\uff0890\u00b0\uff0b\uff09\u7b49\u4e8ecos\uff0ccos\uff0890\u00b0\uff0b\uff09\u7b49\u4e8e\uff0dsin\u8fd9\u5f88\u795e\u5947\uff0c\u5b83\u6210\u529f\u4e86
\u4f8b\u5982\uff0csin90\u5ea6\uff0b\uff0c90\u5ea6\u7684\u7aef\u70b9\u5728\u5782\u76f4\u8f74\u4e0a\uff0c\u6240\u4ee5\u51fd\u6570\u540d\u53d8\u6210\u4e86\u76f8\u53cd\u7684\u51fd\u6570\u540d\uff0c\u5373cos\uff0c\u6240\u4ee5sin90\u5ea6\uff0b\uff1dcos\u3002
cos37°=0.8
tan37°=0.75
cot37°=1.33
sin53°=0.8
cos53°=0.6
tan53°=1.3
cot53°=0.75
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