三角形Sin角和cos角怎么转换 sin与cos如何转换？
\u4e09\u89d2\u5f62Sin\u89d2\u548ccos\u89d2\u600e\u4e48\u8f6c\u6362sin\u662f\u5bf9\u8fb9\u6bd4\u659c\u8fb9
cos\u662f\u90bb\u8fb9\u6bd4\u659c\u8fb9
\u77e5\u9053\u4e0e\u659c\u8fb9\u7684\u5173\u7cfb\u5c31\u90fd\u80fd\u6c42\u51fa\u6765\u4e86
sinx\u7684\u5e73\u65b9\u52a0\u4e0acosx\u7684\u5e73\u65b9\u7b49\u4e8e1\u6765\u8f6c\u6362
几个方法：sin^2x + cos^2x = 1
sinx = cos(90 - x)
cosx = sin(90 - x)
sin(90 + x) = cosx
sin(270 + x) = - cosx
cos(90 + x) = - sinx
cos(270 + x) = sinx
sina²+cosa²=1 望采纳
cosx = sin(90-x)
sin²a＋cos²a=1
sina=cos(π/2 -a)
绛旓細sin涓巆os鐨勮浆鎹㈠叕寮忔槸浜屽嶈涓庡崐瑙掔殑鍏崇郴锛岃浆鎹㈠叕寮忓涓嬶細1銆佷簩鍊嶈杞寲鍏紡锛歴in2伪=2sin伪cos伪 cos2伪=cos^2(伪)-sin^2(伪)=2cos^2(伪)-1=1-2sin^2(伪)2銆佺敱浜屽嶈鍏紡锛屽彲浠ョ户缁帹瀵煎嚭鍗婅杞寲鍏紡锛歴in^2(伪/2)=(1-cos伪)/2 cos^2(伪/2)=(1+cos伪)/2 cos鍏紡鐨勫叾浠...
绛旓細sin鍜宑os鐨勮浆鍖栧叕寮忔槸sin(蟺/2+伪)=cos伪;cos(蟺/2+伪)=-sin伪;sin(蟺/2-伪)=cos伪;cos(蟺/2-伪)=sin伪銆傛嫇灞曠煡璇嗭細姝ｅ鸡锛坰in锛夊拰浣欏鸡锛坈os锛夋槸涓夎鍑芥暟涓殑涓や釜閲嶈姒傚康锛屽畠浠彲浠ラ氳繃涓浜涘彉鎹㈠叕寮忚繘琛岀浉浜掕浆鎹備互涓嬫槸鍑犱釜甯哥敤鐨勪笁瑙掑嚱鏁板彉鎹㈠叕寮忥細1.sin²x+cos²x=1 杩欎釜...
绛旓細cos鍜宻in杞崲鍏紡鏈夛細sin锛2k蟺+伪锛=sin伪銆乧os锛2k蟺+伪锛=cos伪銆乻in锛埾+伪锛=锛峴in伪銆乧os锛埾+伪锛=锛峜os伪銆乻in锛堬紞伪锛=锛峴in伪銆乧os锛堬紞伪锛=cos伪绛夈俢os鏄綑寮﹀硷紝sin鏄寮﹀笺傛寮﹀兼槸鍦ㄧ洿瑙掍笁瑙掑舰涓紝瀵硅竟鐨勯暱姣斾笂鏂滆竟鐨勯暱鐨勫笺備换鎰忛攼瑙掔殑姝ｅ鸡鍊肩瓑浜庡畠鐨勪綑瑙掔殑浣欏鸡鍊硷紝浠...
绛旓細cos(270 + x) = sinx
绛旓細sin鍜宑os鐨勮浆鍖栧叕寮忥細sin(/2+a)=cosa tan鍜宻in銆乧os鐨勫叧绯绘槸涓夎鍑芥暟鍏崇郴锛屼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︿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銆備篃鍙互绛変环鍦扮敤涓庡崟浣嶅渾鏈夊叧鐨勫悇绉嶇嚎娈电殑闀垮害鏉ュ畾涔夈備笁瑙掑嚱鏁板湪鐮旂┒涓夎褰㈠拰鍦嗙瓑鍑犱綍褰㈢姸鐨勬ц川鏃舵湁閲嶈浣滅敤锛屼篃鏄...
绛旓細1銆佷娇鐢ㄥ熀鏈亽绛夊紡杞崲锛氶氳繃涓夎鍑芥暟鐨勫熀鏈亽绛夊紡sin^2锛坸锛+cos^2锛坸锛=1锛屽彲浠ユ眰鍑篶os锛坸锛夌殑鍊笺傚鏋滃凡鐭in锛坸锛夌殑鍊硷紝鍙互閫氳繃绉婚」骞跺紑鏂瑰緱鍒癱os锛坸锛=卤鈭氾紙1-sin^2锛坸锛夛級銆傜劧鍚庢牴鎹鐨勮寖鍥寸‘瀹歝os锛坸锛夌殑绗﹀彿銆2銆佷娇鐢ㄦ煡琛ㄦ硶锛氬湪瀹為檯璁＄畻涓紝鍙互浣跨敤鏁板鐢ㄨ〃鏌ュ嚭cos锛坸锛夌殑鍊笺
绛旓細sin鎬庝箞杞崲鎴cos锛歴in锛埾/2+伪锛=cos伪锛沜os锛埾/2+伪锛=锛峴in伪锛泂in锛埾/2锛嵨憋級=cos伪绛夈備竴銆乻in鐨勪粙缁 sin鏄洿瑙涓夎褰鐨勫杈逛笌鏂滆竟涔嬫瘮锛宻inA=鈭燗鐨勫杈/鏂滆竟锛屾寮﹀湪鐩磋涓夎褰腑锛屼换鎰忎竴閿愯鈭燗鐨勫杈逛笌鏂滆竟鐨勬瘮鍙仛鈭燗鐨勬寮︼紝璁颁綔sinA銆傚嬀鑲″鸡鏀惧埌鍦嗛噷銆傚鸡鏄渾鍛ㄤ笂涓ょ偣杩炵嚎銆
绛旓細cos鍙互鍒╃敤涓夎鍑芥暟鍏紡sin(蟺/2-a)=cosa鎴栬卻in(蟺/2+a)=cosa锛杞崲鎴恠in銆傁/2卤伪涓幬辩殑涓夎鍑芥暟鍊间箣闂寸殑鍏崇郴锛歴in锛埾/2+伪锛=cos伪 sin锛埾/2锛嵨憋級=cos伪 cos锛埾/2+伪锛=锛峴in伪 cos锛埾/2锛嵨憋級=sin伪 tan锛埾/2+伪锛=锛峜ot伪 tan锛埾/2锛嵨憋級=cot伪 cot锛埾/2+伪...
绛旓細sin C = sin (180掳 - A - B)涓変釜鍐呰鐨勬寮﹀嚱鏁扮浉绛夛紝鍗 sin A = sin B = sin C 2. cos A = -cos (B + C)cos B = -cos (A + C)cos C = -cos (A + B)涓変釜鍐呰鐨勪綑寮﹀嚱鏁扮浉鍙嶏紝鍗 cos A = -cos B = -cos C銆傝繖鏄洜涓涓夎褰鍐呰鍜屼负180搴︺傞渶瑕佹敞鎰忕殑鏄紝杩欎簺...
绛旓細涓锛夊悓瑙涓夎鍑芥暟鐨勫熀鏈叧绯伙細(sin胃)^2+锛cos胃)^2=1;tan胃cot胃=sin胃csc胃=cos胃sec胃=1;(sec胃)^2-(tan^胃)^2=(csc胃)^2-(cos胃)^2=1 浜岋級璇卞鍏紡锛屽湪360掳鍐呯殑鍙樻崲锛瑙掑害鍒讹級锛氬彇鍊 sin胃 cos胃 tan胃 伪 sin伪 cos伪 tan伪 -伪 -sin伪 cos伪 -tan伪 180+伪 -sin...
