cos和sin转换公式 cos和sin转换公式诱导公式是什么？
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\u76f8\u5173\u4fe1\u606f\uff1a
1\u3001\u5f53a>bsinA\u65f6\uff1a
\u5f53b>a\u4e14cosA>0\uff08\u5373A\u4e3a\u9510\u89d2\uff09\u65f6\uff0c\u5219\u6709\u4e24\u89e3\uff1b\u5f53b>a\u4e14cosA\u22640\uff08\u5373A\u4e3a\u76f4\u89d2\u6216\u949d\u89d2\uff09\u65f6\uff0c\u5219\u6709\u96f6\u89e3\uff08\u5373\u65e0\u89e3\uff09\uff1b\u5f53b=a\u4e14cosA>0\uff08\u5373A\u4e3a\u9510\u89d2\uff09\u65f6\uff0c\u5219\u6709\u4e00\u89e3\uff1b\u5f53b=a\u4e14cosA\u22640\uff08\u5373A\u4e3a\u76f4\u89d2\u6216\u949d\u89d2\uff09\u65f6\uff0c\u5219\u6709\u96f6\u89e3\uff08\u5373\u65e0\u89e3\uff09\u3002
2\u3001\u5f53a=bsinA\u65f6\uff1a\u5f53cosA>0\uff08\u5373A\u4e3a\u9510\u89d2\uff09\u65f6\uff0c\u5219\u6709\u4e00\u89e3\uff1b\u5f53cosA\u22640\uff08\u5373A\u4e3a\u76f4\u89d2\u6216\u949d\u89d2\uff09\u65f6\uff0c\u5219\u6709\u96f6\u89e3\uff08\u5373\u65e0\u89e3\uff09\u3002
绛旓細涓夎鍑芥暟鐨杞崲琛 璇卞鍏紡 sin(蟺+伪)=-sin伪 cos(蟺+伪)=-cos伪 sin(-伪)=-sin伪 cos(-伪)=cos伪 sin(2蟺-伪)=-sin伪 cos(2蟺-伪)=cos伪 sin(蟺-伪)=sin伪 cos(蟺-伪)=-cos伪 sin(蟺/2+伪)=cos伪 sin(蟺/2-伪)=cos伪 sin(3蟺/2+伪)=-cos伪 sin(3蟺/2-伪)=...
绛旓細sin鍜宑os鐨杞寲鍏紡锛歴in(/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cos杞彉涓簊in鐨勬柟娉曪細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銆傛寮﹀嚱鏁板拰浣欏鸡鍑芥暟鐨勫彉鎹竴鑸槸鍒╃敤涓夎鍑芥暟鍏紡鏉ヨ浆鍙樼殑銆傝繖涓叕寮忎腑鍙互鐪嬪彛璇鏉ュ彉鍖栵紝鍏朵腑鐨勫彛璇灏辨槸锛氬鍙樺伓涓嶅彉锛岀鍙风湅璞￠檺銆備緥濡俢os(x+270掳)鍙樻崲涓簊in x銆270掳鏄(蟺/2)鐨3鍊嶏紝濂囨暟鍊...
绛旓細cos2(a2)=1+cos(a)2 tan(a2)=1-cos(a)sin(a)=sina1+cos(a)7;cos(a)=a2+b2sin(a+c)鍏朵腑 tan(c)=ba a⋅.鍜屽樊鍖栫Н鍏紡 sin(a)+sin(b)=2sin(a+b2)cos(a-b2)sin(a).绉寲鍜屽樊鍏紡 (涓婇潰鍏紡鍙嶈繃鏉ュ氨寰楀埌浜)sin(a)sin(b)=-12⋅.涓よ鍜屼笌宸殑涓夎鍑芥暟 sin(...
绛旓細绗﹀彿 sin cos tan cot sec csc 姝ｅ鸡鍑芥暟 sin锛圓锛=a/h 浣欏鸡鍑芥暟 cos锛圓锛=b/h 姝ｅ垏鍑芥暟 tan锛圓锛=a/b 浣欏垏鍑芥暟 cot锛圓锛=b/a 鍦ㄦ煇涓鍙樺寲杩囩▼涓紝涓や釜鍙橀噺x銆亂锛屽浜庢煇涓鑼冨洿鍐呯殑x鐨勬瘡涓涓硷紝y閮芥湁纭畾鐨勫煎拰瀹冨搴旓紝y灏辨槸x鐨勫嚱鏁般傝繖绉嶅叧绯讳竴鑸敤y=f(x)鏉ヨ〃绀恒1銆佷袱瑙鍜屽叕寮...
绛旓細1銆鍏紡涓锛氳伪涓轰换鎰忚锛岀粓杈圭浉鍚岀殑瑙掔殑鍚屼竴涓夎鍑芥暟鐨勫肩浉绛夛細sin锛2k蟺锛嬑憋級锛漵in伪 cos锛2k蟺锛嬑憋級锛漜os伪 tan锛2k蟺锛嬑憋級锛漷an伪 cot锛2k蟺锛嬑憋級锛漜ot伪 2銆佸叕寮忎簩锛氳伪涓轰换鎰忚锛屜锛嬑辩殑涓夎鍑芥暟鍊间笌伪鐨勪笁瑙掑嚱鏁板间箣闂寸殑鍏崇郴锛歴in锛埾锛嬑憋級锛濓紞sin伪 cos锛埾锛嬑憋級锛濓紞...
绛旓細sin(伪+90掳)=cos伪銆俿in涓巆os鐨杞崲鍏紡90搴﹁鍐呭叕寮忔槸sin锛埾/2+伪锛= cos伪銆俿in(-伪)= -sin伪銆俢os(-伪) = cos伪銆俿in(蟺/2-伪)= cos伪銆俢os(蟺/2-伪) =sin伪銆俿in(蟺/2+伪) = cos伪銆俢os(蟺/2+伪)= -sin伪銆傝瀵煎叕寮忓彛璇鈥滃鍙樺伓涓嶅彉锛岀鍙风湅璞￠檺鈥濇剰涔夛細锛1锛夊綋...
绛旓細1.浠嬬粛cosine鍜宻ine鐨勫畾涔夛細cosine锛堜綑寮︼級鍜宻ine锛堟寮︼級鏄笁瑙掑嚱鏁颁腑鐨勪袱涓噸瑕佸嚱鏁帮紝瀹冧滑涓庡崟浣嶅渾涓婄殑鐐圭殑鍧愭爣鏈夊叧銆傚湪涓涓互鍘熺偣涓轰腑蹇冦佸崐寰勪负1鐨勫崟浣嶅渾涓婏紝瀵逛簬浠绘剰涓涓搴锛堝姬搴﹀埗锛夛紝鐐筆(x,y)鐨勬í鍧愭爣灏辨槸cos(x)锛岀旱鍧愭爣灏辨槸sin(x)銆2.鎺ㄥcos鍜宻in杞崲鍏紡鐨勫師鐞嗭細鍋囪鐐筆(x,y)...
绛旓細cos鍜宻in杞崲鍏紡璇卞鍏紡锛歴inx=卤鈭(1-cosx鈭2)cosx=卤鈭(1-sinx鈭2)銆備互涓嬫槸璇卞鍏紡鐨勭浉鍏充粙缁嶏細璇卞鍏紡鏄寚涓夎鍑芥暟涓紝鍒╃敤鍛ㄦ湡鎬у皢瑙掑害姣旇緝澶х殑涓夎鍑芥暟锛岃浆鎹负瑙掑害姣旇緝灏忕殑涓夎鍑芥暟鐨勫叕寮忋 璇卞鍏紡鏈夊叚缁勶紝鍏54涓傚鍙樺伓涓嶅彉锛岀鍙风湅璞￠檺銆傛敞锛氬鍙樺伓涓嶅彉锛堝k鑰岃█锛屾寚k鍙栧鏁版垨...
绛旓細sin(-伪)= -sin伪锛cos(-伪) = cos伪锛泂in(蟺/2-伪)= cos伪锛沜os(蟺/2-伪) =sin伪锛泂in(蟺/2+伪) = cos伪锛沜os(蟺/2+伪)= -sin伪锛泂in(蟺-伪) =sin伪锛沜os(蟺-伪) = -cos伪锛泂in(蟺+伪)= -sin伪锛沜os(蟺+伪) =-cos伪锛泃anA= sinA/cosA锛泃an锛埾/2锛嬑憋級锛濓紞...
