tan15度等于多少 tan15度等于多少
tan15\u5ea6\u7b49\u4e8e\u591a\u5c11\uff1ftan15\u00b0=2-\u221a3\u22480.27\u3002
tan15\u00b0=tan(60\u00b0-45\u00b0)=(tan60\u00b0- tan45\u00b0)/(1+ tan60\u00b0*tan45\u00b0)=(\u221a3 -1)/(1+\u221a3\uff09=(\u221a3-1)*(\u221a3-1)/[(\u221a3+1)(\u221a3-1)]=(4-2\u221a3)/2=2-\u221a3\u3002
\u6269\u5c55\u8d44\u6599\uff1a
tan\u6b63\u5207\u51fd\u6570\u56fe\u50cf\u7684\u6027\u8d28
\u5b9a\u4e49\u57df\uff1a{x|x\u2260(\u03c0/2)+k\u03c0,k\u2208Z}
\u503c\u57df\uff1aR
\u5947\u5076\u6027\uff1a\u6709\uff0c\u4e3a\u5947\u51fd\u6570
\u5468\u671f\u6027\uff1a\u6709
\u6700\u5c0f\u6b63\u5468\u671f\uff1a\u03c0
\u5355\u8c03\u6027\uff1a\u6709
\u5355\u8c03\u589e\u533a\u95f4\uff1a(-\u03c0/2+k\u03c0\uff0c+\u03c0/2+k\u03c0),k\u2208Z
\u5355\u8c03\u51cf\u533a\u95f4\uff1a\u65e0
=tan(60°-45°)
=(tan60°- tan45°)/(1+ tan60°*tan45°)
=(根号3 -1)/(1+根号3)
=(根号3-1)*(根号3-1)/[(根号3+1)(根号3-1)]
=(4-2根号3)/2
=2-根号3
tan(15°) = 0.26794919243112
等于=0.26794919243112270647255365849413
0.26794919243112
看着15度等于2一根号三
绛旓細鍏充簬tan15搴︾瓑浜庡灏鏁帮紝tan 15搴︾瓑浜庡灏杩欎釜寰堝浜鸿繕涓嶇煡閬擄紝浠婂ぉ鏉ヤ负澶у瑙g瓟浠ヤ笂鐨勯棶棰橈紝鐜板湪璁╂垜浠竴璧锋潵鐪嬬湅鍚э紒1銆乼an15掳锛2锛嶁垰3銆2銆佽В绛旇繃绋嬪涓嬶細浣滀笁瑙掑舰ABC锛屼娇鈭燙锛90掳锛屸垹ABC锛30掳銆3銆佽AC锛1锛屽垯AB锛2AC锛2锛孊C锛濃垰锛圓B²锛岮C²锛夛紳鈭3銆4銆佸欢闀緾B鍒癉锛屼娇...
绛旓細tan15搴︾瓑浜2-鈭3
绛旓細tan15搴︾瓑浜0.267949銆傝В閲婏細1. tan鏄鍒囧嚱鏁扮殑涓绉嶈〃杈炬柟寮忥紝鐢ㄤ簬璁$畻瑙掑害瀵瑰簲鐨勫杈逛笌閭昏竟鐨勬瘮鍊笺傚叿浣撳埌tan15搴︼紝灏辨槸姹備竴涓搴︿负15搴︾殑鐩磋涓夎褰腑锛屽杈逛笌閭昏竟鐨勬瘮鍊笺2. 鍦ㄦ暟瀛﹁绠椾腑锛宼an15搴︾殑鍊兼槸涓涓壒瀹氱殑鏁板硷紝闇瑕侀氳繃璁$畻鎴栬呮煡闃呮暟瀛﹁〃寰楀埌銆傜簿纭埌灏忔暟鐐瑰悗浜斾綅锛宼an15搴︾瓑浜0....
绛旓細姹tan15掳鍊肩殑鏂规硶锛屽鐢ㄤ笁瑙掑嚱鏁拌В锛屾湁涓嶅皯鏂规硶锛岀幇鐢ㄤ竴绉嶅嚑浣曟柟娉曟潵瑙o細杩欎釜鏂规硶搴旇寰堥傚悎娌℃湁瀛﹁繃涓夎鍑芥暟鐨勫鍙嬪惂锛
绛旓細tan15搴绾绛変簬0.2679491977銆備互涓嬫槸瀵硅闂鐨 涓夎鍑芥暟涓殑tan鍊硷紝鍗虫鍒囧硷紝琛ㄧず鐩磋涓夎褰腑锛岀洿瑙掑搴旂殑瀵硅竟涓庨偦杈圭殑姣斿笺傚湪璁$畻鏈烘垨绉戝璁$畻鍣ㄤ笂锛屽彲浠ョ洿鎺ヨ緭鍏an鍑芥暟鍜岃搴﹀兼潵寰楀埌缁撴灉銆傚浜巘an15搴︼紝瀹冭〃绀轰竴涓搴︿负15搴︾殑鐩磋涓夎褰腑锛屽杈逛笌閭昏竟鐨勬瘮渚嬨傚湪瀹為檯搴旂敤涓紝杩欑璁$畻甯哥敤浜庤В鍐...
绛旓細= [(-1 ± √13) / (2 * √3)] / 2 = (-1 ± √13) / (4 * √3)鐢变簬tan15°鏄竴涓鏁帮紙鍥犱负瑙掑害鍦0鍒90搴︿箣闂达級锛屾垜浠夋嫨姝g殑骞虫柟鏍癸細tan15° = (√13 - 1) / (4 * √3)鎵浠ワ紝tan15搴澶х害绛変簬0.2679銆傛眰瑙an...
绛旓細鎮ㄨ闂殑鏄tan15搴︾瓑浜庡灏鍚楋紵0.267949192431銆傛牴鎹笁瑙掑嚱鏁板叕寮忓緱鐭ワ紝tan15搴︾瓑浜0.267949192431锛屼笁瑙掑嚱鏁版槸鏁板涓睘浜庡垵绛夊嚱鏁颁腑鐨勮秴瓒婂嚱鏁扮殑涓绫诲嚱鏁般
绛旓細tan15搴=tan(30/2)搴 鍥犱负 tan(伪/2)=(1-cos伪)/sin伪 =(1-cos30搴)/sin30搴 =(1-鈭3/2)/(1/2)=2(1-鈭3/2)鎵浠an15搴=2(1-鈭3/2)tan45搴=1
绛旓細tan15掳=2-鈭3銆傝绠楄繃绋嬶細tan15掳 =tan(60掳-45掳)=(tan60掳- tan45掳)/(1+ tan60掳*tan45掳)=(鈭3 -1)/(1+鈭3锛=(鈭3-1)*(鈭3-1)/[锛堚垰3+1锛夛紙鈭3-1锛夛冀=(4-2鈭3)/2 =2-鈭3 绉笌鍊掓暟鐨勫嚱鏁板叧绯伙細绉殑鍏崇郴锛歴in伪 = tan伪 脳 cos伪锛堝嵆sin伪 / cos伪 = ...
绛旓細鍒楀紡璁$畻涓 tan15掳=2-鈭3.鍙互閫氳繃鏋勯犵洿瑙掍笁瑙掑舰姹傚緱绛旀.