tan多少度等于3.5
74度。由反函数公式代入可得tan X=3.5，X=arctan3.5=74°。函数是数学名词，代数式中，凡相关的两数X与Y，对于每个X值，都只有一个Y的对应值。绛旓細瑕佸垎涓ょ鎯呭喌:椤惰=24搴, 椤惰鐨勪竴鍗=12搴, 搴曡竟鐨勪竴鍗=3.5, 鑵伴暱涓簒, sin12搴=3.5/x, x=3.5/sin12搴=3.5/0.2079=16.8cm 搴曡=24搴, cos24=3.5/x,x=3.5/cos24搴=3.5/0.9135=3.8314cm
绛旓細鐢ㄤ笁瑙掑嚱鏁 瑙ｏ細杩嘐浣淓G鈭C浜P浜嶨锛屸埖EF鈭P锛屸埓鍥涜竟褰FEG鏄钩琛屽洓杈瑰舰锛庡湪Rt鈻砅EG涓紝PE=3.5锛屸垹P=30掳锛tan鈭燛PG= EG EP 锛屸埓EG=EP•tan鈭燗DB=3.5脳tan30掳鈮2.02锛庡張鈭靛洓杈瑰舰BFEG鏄钩琛屽洓杈瑰舰锛屸埓BF=EG=2.02锛屸埓AB=AF-BF=2.5-2.02=0.48锛庡張鈭礎D鈭E锛屸垹BDA=...
绛旓細閿ヨ鏄寚鍦嗛敟鐨勮酱鎴潰锛堢粡杩囧渾閿ョ殑杞寸殑鎴潰锛夌殑涓ゆ潯姣嶇嚎涔嬮棿鐨勮銆傜洿寰勪负7绫筹紝閭ｄ箞鍗婂緞涓3.5绫筹紝70搴﹀彇涓鍗婁负35搴︺傞珮銆佸簳闈㈠崐寰勪互鍙婃瘝绾跨粍鎴愮洿瑙掍笁瑙掑舰銆傚垯鏈tan35=鍗婂緞闄や互楂樼害涓0.7锛屽垯楂绛変簬3.5闄や互0.7绛変簬5绫炽
绛旓細tan 伪=3.5/4=0.875 伪=arctan0.875鈮41.185925掳=41掳11'9"銆愇=arctan0.875 1锛屾煡鍙嶄笁瑙掑嚱鏁拌〃锛2锛岀敤宸ョ▼璁＄畻鍣ㄣ佺瀛﹁绠楀櫒璁＄畻锛3锛岀敤鐢靛瓙琛ㄦ牸EXCEL鐨勫叕寮忚绠楋紱=DEGREES(ATAN(0.875))銆
绛旓細tan30掳鈮0.57735 tan30掳*3.5=7鈭3/6鈮2.02 璁＄畻鍣ㄦ湁娌℃湁锛熸寜涓涓嬩笉灏辩煡閬撲簡锛
绛旓細瑙ｏ細杩囩偣EG鈭C浜 BP浜庣偣G锛屸埓EF鈭P锛屸埓鍥涜竟褰PEG鏄钩琛屽洓杈瑰舰锛屽湪Rt鈻砅EG涓紝PE=3.5锛屸垹P=30掳锛tan鈭燛PG= 锛屸埓EG=EP路tan鈭燗DB=3.5脳tan30掳鈮2.02锛堟垨EC= 锛夛紝鍙堚埖鍥涜竟褰FEG鏄钩琛屽洓杈瑰舰锛屸埓BF=EG=2.02锛屸埓AB=AF-BF-2.5-2.02=0.48锛堟垨AB= 锛夛紝鍙堚埖AD鈭E锛...
绛旓細0.06116262
绛旓細鏈鍚庣畻鍑虹殑绛旀鍥涜垗浜斿叆绛変簬53搴︺鐩稿綋浜鐩磋涓夎褰㈣緝鐭殑涓鏉＄洿瑙掕竟鏄3,杈冮暱鐨勪竴鏉＄洿瑙掕竟鏄4銆傞偅涔堣搴︽槸arctan0.75锛屾渶鍚庡啀鐢ㄨ绠楀櫒绠楀嚭涓53.13010235搴︺傚浘绾告槸鐢ㄦ爣鏄庡昂瀵哥殑鍥惧舰鍜屾枃瀛楁潵璇存槑宸ョ▼寤虹瓚銆佹満姊般佽澶囩瓑鐨勭粨鏋勩佸舰鐘躲佸昂瀵稿強鍏朵粬瑕佹眰鐨勪竴绉嶆妧鏈枃浠躲傚彟涓绉嶈В閲:鎸囪褰曞浘褰㈠瓧鐨勫獟浠...
绛旓細tan(A+B)=(tanA+tanB)/(1-tanA*tanB)=3.5/(1-3.5)=-7/5 tanC=-tan(A+B)=7/5 ,鍙眰鍑簊inC锛宑osC c=7鏍瑰彿3/6 鏈夐潰绉叕寮廠=0.5absinC鍙眰鍑篴b 鍐嶇敱浣欏鸡瀹氱悊cosC=(a^2+b^2-c^2)/2ab=[(a+b)-2ab-c^2]/2ab 鍙眰鍑篴+b.
绛旓細sin15º=(鈭6-鈭2)/4 cos15º=(鈭6+鈭2)/4 tan15º==(鈭6-鈭2)/(鈭6+鈭2)=(8-4鈭3)/4=2-鈭3 鍐嶇敤涓夎鍑芥暟鐨勫畾涔夛紝鍥犱负涓嶇煡閬撴槸閭昏竟杩樻槸鐩磋杈绛変簬3.5 濡傛灉鏄偦杈=3.5 瀵硅竟=3.5*tan15º
