cos等于1的角度是多少度？ cos∠BAC=1/4，BAC是多少度？
cos\u591a\u5c11\u5ea6\u7b49\u4e8e-1180
\u5728\u25b3ABC\u4e2d\uff0ccos\u2220BAC=1/4\uff0c
\u6240\u4ee5\u2220BAC\u224875.52248781\u00b0\u3002
2nπ，其中n=0,1,2,3.等任何正整数
cos0°=1
0度，cos0=sin90=1
2kπ k属于Z
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绛旓細1銆cos伪锛氳〃绀轰袱鏉¤竟涔嬮棿鐨勫す瑙掓槸伪鏃讹紝鍏朵腑涓鏉¤竟鎵瀵圭殑閭ｄ釜椤剁偣鍒板杈圭殑璺濈涓庡彟涓ゆ潯杈逛箣闂寸殑璺濈涔嬫瘮銆2銆乧os尾锛氳〃绀轰袱鏉¤竟涔嬮棿鐨勫す瑙掓槸尾鏃讹紝鍏朵腑涓鏉¤竟鎵瀵圭殑閭ｄ釜椤剁偣鍒板杈圭殑璺濈涓庡彟涓ゆ潯杈逛箣闂寸殑璺濈涔嬫瘮銆3銆乧os纬锛氳〃绀轰袱鏉¤竟涔嬮棿鐨勫す瑙掓槸纬鏃讹紝鍏朵腑涓鏉¤竟鎵瀵圭殑閭ｄ釜椤剁偣鍒板杈圭殑...
绛旓細绛変簬鍗婂緞闀跨殑鍦嗗姬鎵瀵圭殑鍦嗗績瑙掑彨鍋1寮у害鐨勮锛岀敤绗﹀彿rad琛ㄧず锛岃浣滃姬搴︺傜敤寮у害浣滃崟浣嶆潵搴﹂噺瑙掔殑鍒跺害鍙仛寮у害鍒躲傝瀹氬懆瑙掔殑360鍒嗕箣涓涓1搴︾殑瑙掞紝鐢ㄥ害浣滀负鍗曚綅鏉ュ害閲忚鐨勫崟浣嶅埗鍙仛瑙掑害鍒躲1 rad = (180/蟺)掳鈮57.30掳=57掳18藠锛屾墍浠cos1瀹為檯涓婃寚鐨勬槸cos(57掳18藠)锛屽彧鏄崟浣嶄笉鍚岃屽凡銆
绛旓細1琛ㄧず鐨勬槸寮у害锛岃〃绀涓搴︼紝蟺=180搴︼紝1寮у害=180/蟺銆傛墍浠in1=sin(180/蟺 ) 锛cos1=cos(180/蟺銆傚湪鏁板鍜岀墿鐞嗕腑锛屽姬搴︽槸瑙掔殑搴﹂噺鍗曚綅銆傚畠鏄敱鍥介檯鍗曚綅鍒跺鍑虹殑鍗曚綅锛屽崟浣嶇缉鍐欐槸rad銆傚畾涔夛細寮ч暱绛変簬鍗婂緞鐨勫姬锛屽叾鎵瀵圭殑鍦嗗績瑙涓1寮у害銆(鍗充袱鏉″皠绾夸粠鍦嗗績鍚戝渾鍛ㄥ皠鍑猴紝褰㈡垚涓涓澶硅鍜屽す瑙掓瀵圭殑涓...
绛旓細浣犵殑鐞嗚В鏄敊璇殑銆傚姬搴︽槸寮ч暱鍜屽崐寰勭殑姣斿笺瑙掑害鏄鎶涓涓懆瑙掑垎涓360绛変唤锛屾瘡涓绛変唤鍙仛1搴銆傝浆鎹㈠叧绯伙細胃/180=伪/蟺锛屛告槸瑙掑害鍒讹紝伪鏄姬搴﹀埗銆傛帹璁猴細1寮у害=180/蟺搴︹増57.3搴︼紝1搴=蟺/180寮у害鈮0.017寮у害銆
绛旓細鐩稿叧鐭ヨ瘑鐐 cos1鎸鐨勬槸1寮у害鐨勮鎵瀵圭殑浣欏鸡鍊硷紝鑰宑os1掳鎸囩殑鏄1掳鐨勪綑寮﹀硷紝绛変簬鍗婂緞闀跨殑鍦嗗姬鎵瀵圭殑鍦嗗績瑙掑彨鍋1寮у害鐨勮锛岀敤绗﹀彿rad琛ㄧず锛岃浣滃姬搴︺傜敤寮у害浣滃崟浣嶆潵搴﹂噺瑙掔殑鍒跺害鍙仛寮у害鍒躲傝瀹氬懆瑙掔殑360鍒嗕箣涓涓1搴︾殑瑙掞紝鐢ㄥ害浣滀负鍗曚綅鏉ュ害閲忚鐨勫崟浣嶅埗鍙仛瑙掑害鍒躲1 rad = (180/蟺)掳鈮57...
绛旓細cos(1) = 0.9998476952 銆俢os(0) = 1.0000000000銆
绛旓細sin1=0.01745 cos1=0.9998 tan1=0.01746 cot1=57.29 sec1=1.000 csc1=57.30
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绛旓細sin1=0.01745 cos1=0.9998 tan1=0.01746 cot1=57.29 sec1=1.000 csc1=57.30
