sin1度＋sin2度＋...＋sin359度
sin1+sin181=0,sin2+sin182=0,
.
sin179+sin359=0
sin1+sin2+sin3+.+sin360=0
绛旓細sin1搴骞虫柟+ sin2搴骞虫柟+sin3搴﹀钩鏂孤仿仿+sin87搴﹀钩鏂+sin88搴﹀钩鏂+sin89搴﹀钩鏂 鍥犱负sin89=cos1锛宻in88=cos2锛宻in87=cos3锛屸︹︼紝鍥犱负寮忓瓙涓湁89椤癸紝鎵浠ヤ腑闂撮」sin45鏄崟鐙殑涓椤癸紝鎵浠ュ師寮忓瓙=sin1搴﹀钩鏂+ sin2搴﹀钩鏂+sin3搴﹀钩鏂光+sin45搴﹀钩鏂+鈥+cos3搴﹀钩鏂+cos2搴﹀钩鏂+cos1搴﹀钩鏂癸紝...
绛旓細S=(sin0搴)^2+(sin1搴)^2+(sin2搴)^2+鈥︼紜(sin89搴)^2锛(sin90搴)^2 (1)鍊掑簭鍐欎竴涓 S=(sin90搴)^2+(sin89搴)^2+(sin88搴)^2+鈥︼紜(sin1搴)^2锛(sin0搴)^2 鎵浠 S=(cos0搴)^2+(cos2搴)^2+(cos3搴)^2+鈥︼紜(cos1搴)^2锛(cos0搴)^2 (2)(1)+(2)...
绛旓細鍍忚繖绉嶉兘鏄钩鏂圭殑 鎴戜滑涓鑸敤闄嶅箓鍗囪 瑕佺敤鍒 COS2伪=1-2SIn伪²鎵浠 Sin1搴鐨勫钩鏂+sin2搴鐨勫钩鏂+...+sin89搴﹀钩鏂瑰氨鍙互鍖栦负 1/2-1/2COS2+1/2-1/2COS4+...+1/2-1/2COS178 =1/2脳89-1/2[锕機OS2+COS178锕+锕機OS4+COS174锕+...+锕機OS89+COS91锕+COS90]=1/2脳8...
绛旓細锛坰in3º)^6+(sin87º)^6=5/8+3/8 cos12º.锛坰in44º)^6+(sin46º)^6=5/8+3/8 cos176º锛坰in45º)^6=(鈭2/2)^6=1/8 涓婇潰45绛夊紡鐩稿姞:鍗 sin1搴6娆℃柟+ sin2搴6娆℃柟 路路路sin89搴6娆℃柟 =5/8*44+1/8+3/8( cos4º+cos...
绛旓細sin1搴鐨勫钩鏂瑰姞sin2搴︾殑骞虫柟涓鐩村姞閬搒in89搴︾殑骞虫柟 =sin1搴²+sin2搴²+...+sin44搴²+sin45搴²+cos44搴²+...+cos2搴²+cos1搴²=1+1+1+...+1/2 =44 鍙1/2
绛旓細锛Sin1掳)² + (Sin2掳)²+ 鈥︹ + (sin45掳)² + (sin46掳)² + 鈥︹ + (Sin89掳)² + (sin90掳)²= 锛圫in1掳)² + (Sin2掳)²+ 鈥︹ + (sin45掳)² + (cos44掳)² + 鈥︹ + (cos1掳)² + (sin90掳...
绛旓細sin1搴鐨勫钩鏂+sin2搴鐨勫钩鏂+銆傘傘+sin鐨89搴︾殑骞虫柟 1涓洖绛 #鐑# 鑱屽満涓婂彈濮斿眻瑕佷笉瑕佷负鑷繁瑙ｉ噴?鏆楅娌佷汉 楂樿禐绛斾富 2013-03-18 路 瑙夊緱鎴戣鐨勫閭ｅ氨澶氬鐐硅禐 鐭ラ亾澶ф湁鍙负绛斾富 鍥炵瓟閲:1涓 閲囩撼鐜:60% 甯姪鐨勪汉:7226涓 鎴戜篃鍘荤瓟棰樿闂釜浜洪〉 鍏虫敞 灞曞紑鍏ㄩ儴...
绛旓細sin²1掳+sin²2掳+...+sin²89º=sin²1掳+sin²2掳+...+sin²44掳+sin²45掳+sin²46掳+...+sin²88掳+sin²89掳 =sin²1掳+sin²2掳+...+sin²44掳+sin²45掳+cos²44掳+...+cos&#...
绛旓細44掳+鈥+cos²2掳+cos²1掳+sin²90掳 =(sin²1掳+cso²1掳)+(sin²2掳+cos²2掳)+鈥+(sin²44掳+cos²44掳)+sin²45掳+sin²90掳 =1+1+鈥︹+1+(1/2)+1 =44+(1/2)+1 =45+(1/2)=91/2 ...
绛旓細sin锛埼憋紜尾锛夛紳sin伪cos尾锛媍os伪sin尾銆俿in锛埼憋紞尾锛夛紳sin伪cos尾锛峜os伪sin尾銆俢os锛埼憋紜尾锛夛紳cos伪cos尾锛峴in伪sin尾銆俢os锛埼憋紞尾锛夛紳cos伪cos尾锛媠in伪sin尾銆備笁瑙掑嚱鏁板叕寮忕浉鍏筹細涓夎鍑芥暟鏄暟瀛︿腑灞炰簬鍒濈瓑鍑芥暟涓殑瓒呰秺鍑芥暟鐨勫嚱鏁般傚畠浠殑鏈川鏄换浣曡鐨勯泦鍚堜笌涓涓瘮鍊肩殑闆嗗悎鐨勫彉閲忎箣闂寸殑...
