sin10等于多少？（是10，不是10°）麻烦你了，不要光是结果哦，说明一下是怎么计算的，谢谢 sin10°不用计算机要怎么求？
\u6570\u5b66\u9898sin10\u00b0\u7b49\u4e8e\u591a\u5c11\u6211\u8981\u7684\u662f\u8ba1\u7b97\u8fc7\u7a0b\u8bbex=sin10\u00b0\uff0c\u52191/2=sin30\u00b0=3x-4x^3,
\u6574\u7406\u5f97x^3-0.75x+0.125=0,
\u7528\u7efc\u5408\u9664\u6cd5\u6c42\u5f97x\u22480.173648177.
\u53ef\u4ee5\u901a\u8fc7sin\uff08x\uff09\u7684\u7ea7\u6570\u5c55\u5f00\u5f0f\u6c42\u3002sin\uff08x\uff09\u7684\u7ea7\u6570\u5c55\u5f00\u5f0f\u662f\uff1a
sin(x)=x-x^3/(3!)+x^5/(5!)-x^7/(7!)+...
=x-x^3/6+x^5/120-x^7/5040+... \uff081\uff09
\u6b64\u5904x\u662f\u5f27\u5ea6\u800c\u4e0d\u662f\u89d2\u5ea6\u3002\u82e5\u7528\u5f27\u5ea6\uff0csin(10)\u5c31\u5e94\u8868\u8fbe\u6210sin(\u03c0/18)\uff0c\u5373x=\u03c0/18\u3002
\u5c06x=\u03c0/18\u4ee3\u5165\u5f0f\uff081\uff09\uff0c\u5e76\u7528\uff081\uff09\u5f0f\u7684\u524d4\u9879\u505a\u8fd1\u4f3c\u8ba1\u7b97\uff0c\u5373\u5f97\uff1a
sin(\u03c0/18)\u22480.17364817766652\u3002
\u82e5\u7528\u8ba1\u7b97\u5668\u7b97\uff0c\u53ef\u5f97sin(10)=0.17364817766693
\u4e24\u8005\u4ec5\u5728\u5c0f\u6570\u70b9\u540e\u7b2c13\u4f4d\u4ee5\u540e\u624d\u51fa\u73b0\u5dee\u522b\u3002\u589e\u52a0\u7ea7\u6570\u7684\u9879\u6570\u53ef\u8fdb\u4e00\u6b65\u7f29\u5c0f\u6b64\u8bef\u5dee\u3002
\u53e6\u5916\u4e00\u79cd\u505a\u6cd5\u662f\u5229\u7528\u4e0b\u9762\u7684\u516c\u5f0f\uff1a
sin(3x)=3six(x)-4sin³(x)
\u5f53x=10\u65f6\uff0c\u6709\uff1a
0.5=3sin(10)-4sin³(10)
8sin³(10)-6sin(10)+1=0
\u901a\u8fc7\u89e3\u4e0a\u9762\u7684\u4e00\u5143\u4e09\u6b21\u65b9\u7a0b\u53ef\u6c42\u5f97sin(10)\u3002
= sin(10×180/π)°
= - 0.5440
化成度数就是sin (10/pi*180)度，怎么算？这能怎么算，你想用手算？上大学了没？
sin10=sin(10*57.30度)
=sin(573度)
=sin(360+213度)
=sin(213度)
=sin(180+33度)
=-sin(33度)
=-0.54463903501503
绛旓細绛旀锛歴in(10)=0.17364817766693銆傜敱姝ゅ彲鐭ワ紝sin10掳绾︾瓑浜0.174銆傚彲浠ラ氳繃sin锛坸锛夌殑绾ф暟灞曞紑寮忔眰.sin锛坸锛夌殑绾ф暟灞曞紑寮忔槸锛歴in(x)=x-x^3/(3!)+x^5/(5!)-x^7/(7!)+...=x-x^3/6+x^5/120-x^7/5040+...锛1锛夈傛澶剎鏄姬搴﹁屼笉鏄搴.鑻ョ敤寮у害,sin(10)灏卞簲琛ㄨ揪鎴恠in(蟺...
绛旓細Sin10搴︾瓑浜0.173銆係in10搴︽槸鎸囦竴涓搴︿负10搴︾殑鐩磋涓夎褰腑锛屾枩杈逛笌鐩磋杈逛箣姣旓紝鏍规嵁涓夎鍑芥暟琛ㄥ彲寰桽in10搴︾瓑浜0.173銆備笁瑙掑嚱鏁版槸鍩烘湰鍒濈瓑鍑芥暟涔嬩竴锛屾槸浠ヨ搴︼紙鏁板涓婃渶甯哥敤寮у害鍒讹紝涓嬪悓锛変负鑷彉閲忥紝瑙掑害瀵瑰簲浠绘剰瑙掔粓杈逛笌鍗曚綅鍦嗕氦鐐瑰潗鏍囨垨鍏舵瘮鍊间负鍥犲彉閲忕殑鍑芥暟锛屼篃鍙互绛変环鍦扮敤涓庡崟浣嶅渾鏈夊叧鐨勫悇绉嶇嚎...
绛旓細銆愰棶棰樸sin10掳绛変簬澶氬皯锛銆愭眰瑙ｇ瓟妗堛憇in10掳=0.173648 銆愭眰瑙ｆ濊矾銆1銆佽繍鐢ㄥ凡鐭ヤ笁瑙掑嚱鏁扮殑绛夊紡 sin3伪=-4sin³伪+3sin伪,灏30掳鏀瑰啓鎴3脳10掳锛2銆佷护x=sin10掳,鍒欎笂寮忓彲浠ュ啓鎴愪笅鍒楁柟绋嬶紝鍗 4x³-3x+0.5=0锛3銆佽В涓鍏冧笁娆℃柟绋嬶紝鍙敤鏁板兼硶锛堝鐗涢】娉曪級銆傝繍鐢ㄤ笅鍒楀叕寮忚凯浠ｈ...
绛旓細sin30搴=3sin10搴-4sin³10搴 璁緎in10搴=a锛屽垯0<a<1锛屼笂寮忓嵆涓 1/2=3a-4a^3 鍗 8a^3-6a+1==0 瑙ｅ嚭a鍗冲彲锛堝洜琛ㄨ揪寮忓お澶嶆潅锛岃繖閲屾棤娉曞啓鍑猴紝瑙佽皡锛夈
绛旓細sin75掳,搴旇鏄痵in70掳,鍒嗗瓙鍒嗘瘝鍚屼箻浠2sin20掳,鍒╃敤鍊嶈鍏紡鍙互鍖栫畝锛岀粨鏋滀负1/16.鍏蜂綋姹傛硶锛屽鍥炬墍绀
绛旓細绾︿负0.174
绛旓細榛樿鏄搴︽暟锛屾崲绠楁垚210.16667灏卞彲浠ヤ簡 灏10 鍖栦负搴︽暟锛10/60=0.16667 210掳10 鍖栦负210.16667掳,鍦ㄨ绠楀櫒涓婇夋嫨DEG锛屽皢210.16667杈撳叆锛屾寜sin閿
绛旓細^3 sin30= 3sin10 −4(sin10)^3 鐩存帴瑙3娆℃柟绋嬫瘮杈冮毦锛屽彲浠ヤ娇鐢ㄦ笎杩涙柟娉曪紝浣嗕笉鐭ヤ綘瀛﹁繃娌℃湁銆傚厛鎶婅搴﹀寲涓哄姬搴 sin(10搴)=sin(10*3.1416/180)=sin(0.17453)娉板嫆鍏紡锛堝彇鍓嶄笁椤癸級=0.17453-0.17453^3/3!+0.17453^5/5!=0.17453-0.000886+0.00000003748 淇濈暀4浣 =0.1736 ...
绛旓細sin80=0.9848 cos80=鈭(1-sin²80)=0.1736 sin10=sin(90-80)=cos80=0.1736 cos10=sin80=0.9848 sin20=2sin10cos10=2*0.9848*0.1736=0.3419 cos20=鈭(1-sin²20)=0.9397 sin30=0.5 ...渚濇绫讳技
绛旓細sin锛45锛30锛
