tan多少度等于2分之根号3 tan多少度等于2+根号3
3\u5206\u4e4b\u6839\u53f73\u7b49\u4e8e\u591a\u5c113^(1/2))/3=0.57735026918963
3^(1/2)=1.7320508075689
\u5e73\u65b9\u6839\uff0c\u53c8\u53eb\u4e8c\u6b21\u65b9\u6839\uff0c\u8868\u793a\u4e3a\u3014\u00b1\u221a\uffe3\u3015\uff0c\u5176\u4e2d\u5c5e\u4e8e\u975e\u8d1f\u6570\u7684\u5e73\u65b9\u6839\u79f0\u4e4b\u4e3a\u7b97\u672f\u5e73\u65b9\u6839\u3002\u4e00\u4e2a\u6b63\u6570\u6709\u4e24\u4e2a\u5b9e\u5e73\u65b9\u6839\uff0c\u5b83\u4eec\u4e92\u4e3a\u76f8\u53cd\u6570\uff0c\u8d1f\u6570\u6ca1\u6709\u5e73\u65b9\u6839\u3002
\u6269\u5c55\u8d44\u6599
\u5e38\u7528\u5e73\u65b9\u6839\uff1a
\u221a0 = 0\uff08\u8868\u793a\u6839\u53f70\u7b49\u4e8e0\uff0c\u4e0b\u540c\uff09
\u221a1 = 1
\u221a2 = 1.4142135623731
\u221a3 = 1.73205080756888
\u221a4 = 2
\u221a5 = 2.23606797749979
\u221a6 = 2.44948974278318
\u221a7 = 2.64575131106459
\u221a8 = 2.82842712474619
\u221a9 = 3
\u221a10 = 3.16227766016838
\u221a11 = 3.3166247903554
\u221a12 = 3.46410161513775
\u221a13 = 3.60555127546399
\u221a14 = 3.74165738677394
\u221a15 = 3.87298334620742
\u89e3\uff1atan75=tan(45+30)=(tan45+tan30)/(tan45-tan30)=(1-\u6839\u53f73/3)/(1+\u6839\u53f73/3)=2+\u6839\u53f73.
\uff08\u8bf4\u660e\uff1a\u5404\u4e2a\u89d2\u90fd\u7701\u7565\u4e86\u5ea6\uff09
约等于40度54分
绛旓細涓夎鍑芥暟鍏紡 姝ｅ鸡锛坰in锛:瑙捨辩殑瀵硅竟姣斾笂鏂滆竟 浣欏鸡锛坈os锛:瑙捨辩殑閭昏竟姣斾笂鏂滆竟 姝ｅ垏锛tan锛:瑙捨辩殑瀵硅竟姣斾笂閭昏竟 浣欏垏锛坈ot锛:瑙捨辩殑閭昏竟姣斾笂瀵硅竟 姝ｅ壊锛坰ec锛:瑙捨辩殑鏂滆竟姣斾笂閭昏竟 浣欏壊锛坈sc锛:瑙捨辩殑鏂滆竟姣斾笂瀵硅竟 sin30掳=1/2 sin45掳=鏍瑰彿2/2 sin60掳=鏍瑰彿3/2 cos30掳=鏍瑰彿3/2 ...
绛旓細sin鍏崄搴︾瓑浜庝簩鍒嗕箣鏍瑰彿涓锛泂in涓夊崄搴︾瓑浜庝簩鍒嗕箣涓锛泂in鍥涘崄浜斿害绛変簬浜屽垎涔嬫牴鍙蜂簩銆傚嬀鑲″鸡鏀惧埌鍦嗛噷锛屽鸡鏄渾鍛ㄤ笂涓ょ偣杩炵嚎锛屾渶澶х殑寮︽槸鐩村緞銆傛妸鐩磋涓夎褰㈢殑寮︽斁鍦ㄧ洿寰勪笂锛岃偂灏辨槸闀跨殑寮︼紝鍗虫寮︼紝鍕惧氨鏄煭鐨勫鸡锛屽嵆浣欎笅鐨勫鸡锛氫綑寮︺傜Н鐨勫叧绯 sin伪 = tan伪 脳 cos伪锛堝嵆sin伪 / cos伪 = tan...
绛旓細tan30搴︾瓑浜3鍒嗕箣鏍瑰彿3銆浜屽垎涔嬩竴绛変簬arctan1/2銆佺瓑浜庯紙tan45锛/2
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绛旓細tan30掳瀵逛簬涓鍒嗕箣鏍瑰彿涓锛宼an45掳绛変簬1锛宼an60掳绛変簬鏍瑰彿涓夈傛寮︼紝浣欏鸡锛屾鍒囧叕寮忛兘鏄搴旂敤浜庣洿瑙掍笁瑙掑舰銆傚湪鐩磋涓夎褰BC涓紝鈭燙=90掳锛孉B鏄垹C鐨勫杈筩锛孊C鏄垹A鐨勫杈筧锛孉C鏄垹B鐨勫杈筨锛屾鍒囧嚱鏁板氨鏄痶anB=b/a锛屽嵆tanB=AC/BC銆傚鏋滀复鏃跺繕浜嗙殑璇濓紝璁＄畻涓閬嶅氨鐭ラ亾浜嗐備笁瑙掑嚱鏁版槸鏁板涓睘浜...
绛旓細cos60掳绛変簬浜屽垎涔嬩竴锛宑os60掳=0.5寰幆鍛ㄦ湡鏄180掳寮у害鍒跺氨鏄180掳=蟺锛宑os锛2蟺+蟺/3锛夛紝cos30搴︾瓑浜庝簩鍒嗕箣涓銆俢os搴︽暟鍏紡 1銆乧os30=鏍瑰彿3/2銆2銆乧os45=鏍瑰彿2/2銆3銆乧os60=1/2銆俿in搴︽暟鍏紡 1銆乻in30=1/2銆2銆乻in45=鏍瑰彿2/2銆3銆乻in60=鏍瑰彿3/2銆tan搴︽暟鍏紡 1銆乼an30=鏍瑰彿3...
绛旓細tan30掳绛変簬3鍒嗕箣鏍瑰彿3銆倀an30⁰鏄30搴﹁鐨勬鍒囧嚱鏁板笺傛槸涓夎鍑芥暟鐨勪竴绉嶃傚父瑙佺殑涓夎鍑芥暟鍖呮嫭姝ｅ鸡鍑芥暟銆佷綑寮﹀嚱鏁板拰姝ｅ垏鍑芥暟銆傚湪鑸捣瀛︺佹祴缁樺銆佸伐绋嬪绛夊叾浠栧绉戜腑锛岃繕浼氱敤鍒板浣欏垏鍑芥暟銆佹鍓插嚱鏁般佷綑鍓插嚱鏁扮瓑鍏朵粬鐨勪笁瑙掑嚱鏁般備笉鍚岀殑涓夎鍑芥暟涔嬮棿鐨勫叧绯诲彲浠ラ氳繃鍑犱綍鐩磋鎴栬呰绠楀緱鍑猴紝绉颁负涓夎鎭掔瓑...
绛旓細tan30搴=鈭3/3锛泃an45搴=1锛泃an60=鈭3锛泃an90搴︽棤瑙ｃ傚湪涓夎鍑芥暟涓紝鏈変竴浜涚壒娈婅锛屼緥濡30掳銆45掳銆60掳锛岃繖浜涜鐨勪笁瑙掑嚱鏁板间负绠鍗曞崟椤瑰紡锛岃绠椾腑鍙互鐩存帴姹傚嚭鍏蜂綋鐨勫硷紝鍏蜂綋濡備笅琛細涓夎鍑芥暟鏄熀鏈垵绛夊嚱鏁颁箣涓锛屾槸浠ヨ搴︼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...
绛旓細tank蟺锛嬒/6绛変簬涓夊垎涔嬫牴鍙蜂笁銆傝В棰樻濊矾涓鍒╃敤鏂圭▼缁勮繘琛屽弽鎺ㄦ垨鑰呰绠椾互鍙婂埄鐢ㄤ笁瑙掑嚱鏁扮殑鍏紡鍜岀壒鎬э紝鐢ㄥ紡瀛愯〃绀轰负锛tanw=鈭3/3锛屽垯锛歸=k蟺锛嬒/6锛屽叾涓璳鈭圸銆倀an鍑芥暟鐨勫畾涔夛細鍦≧t鈻矨BC锛堢洿瑙掍笁瑙掑舰锛変腑锛屸垹C=90掳锛孉B鏄垹C鐨勫杈筩锛孊C鏄垹A鐨勫杈筧锛孉C鏄垹B鐨勫杈筨锛屾鍒囧嚱鏁板氨鏄痶anB=b...
绛旓細tg30搴︾瓑浜涓鍒嗕箣鏍瑰彿涓銆倀g30掳=鈭3/3銆傚嚱鏁板悕绉皌angent,鍏剁缉鍐欎负tg锛1990骞翠互鍓嶏級锛岀幇鐢tan,鍦ㄨ绠楁満鍑芥暟璋冪敤鏃朵娇鐢(tan)銆傚湪Rt鈻矨BC锛堢洿瑙掍笁瑙掑舰锛変腑锛屸垹C=90掳锛孉B鏄垹C鐨勫杈筩锛孊C鏄垹A鐨勫杈筧锛孉C鏄垹B鐨勫杈筨锛屾鍒囧嚱鏁板氨鏄痶anB=b/a锛屽嵆tanB=AC/BC銆
