回答1:
灞曞紑鍏ㄩ儴
"胃"琛ㄧず瑙掑害,sin胃琛ㄧず胃瑙掔殑姝e鸡鍊笺€傜畝鍗曠偣璇达紝鎶娢告斁鍦ㄤ竴涓洿瑙掍笁瑙掑舰涓紝sin胃灏辫〃绀何歌鎵€瀵圭殑鐩磋杈圭殑鏁板€间笌鏂滆竟鏁板€肩殑姣斿€笺€傦紙濡傛灉胃=90掳锛宻in胃=1锛?/p>姣斿鐩磋涓夎褰㈠嬀鑲″鸡3銆?銆?锛屽亣璁?銆?杈规墍澶圭殑澶硅涓何革紝鍒檚in胃=3/5鎵╁睍璧勬枡:姝e鸡瀹氱悊锛圱he Law of Sines锛夋槸涓夎瀛︿腑鐨勪竴涓熀鏈畾鐞嗭紝瀹冩寚鍑衡€滃湪浠绘剰涓€涓钩闈笁瑙掑舰涓紝鍚勮竟鍜屽畠鎵€瀵硅鐨勬寮﹀€肩殑姣旂浉绛変笖绛変簬澶栨帴鍦嗙殑鐩村緞鈥濓紝鍗砤/sinA = b/sinB =c/sinC = 2r=D锛坮涓哄鎺ュ渾鍗婂緞锛孌涓虹洿寰勶級銆?/p>浣欏鸡锛堜綑寮﹀嚱鏁帮級锛屼笁瑙掑嚱鏁扮殑涓€绉嶃€傚湪Rt鈻矨BC锛堢洿瑙掍笁瑙掑舰锛変腑锛屸垹C=90掳锛堝鍥炬墍绀猴級锛屸垹A鐨勪綑寮︽槸瀹冪殑閭昏竟姣斾笁瑙掑舰鐨勬枩杈癸紝鍗砪osA=b/c锛屼篃鍙啓涓篶osa=AC/AB銆備綑寮﹀嚱鏁帮細f(x)=cosx锛坸鈭圧锛夈€?/p>
回答2:
灞曞紑鍏ㄩ儴
"胃"琛ㄧず瑙掑害,sin胃琛ㄧず胃瑙掔殑姝e鸡鍊笺€傜畝鍗曠偣璇达紝鎶娢告斁鍦ㄤ竴涓洿瑙掍笁瑙掑舰涓紝sin胃灏辫〃绀何歌鎵€瀵圭殑鐩磋杈圭殑鏁板€间笌鏂滆竟鏁板€肩殑姣斿€笺€傦紙濡傛灉胃=90掳锛宻in胃=1锛?br />姣斿鐩磋涓夎褰㈠嬀鑲″鸡3銆?銆?锛屽亣璁?銆?杈规墍澶圭殑澶硅涓何革紝鍒檚in胃=3/5
回答3:
灞曞紑鍏ㄩ儴
胃鏄搴︾鍙?鑰宻in胃琛ㄧず胃瑙掔殑姝e鸡鍊?濡偽革紳30掳鏄紝sin胃鍗宠〃绀簊in30掳锛屼篃灏辨槸1/2!
回答4:
灞曞紑鍏ㄩ儴
澶у啓鐨勎樻槸:绮掑瓙鐗╃悊瀛︿腑pentaquark鐢ㄎ?鏉ヨ〃绀哄皬鍐欑殑胃鏄?鏁板涓婂父浠h〃骞抽潰鐨勮鍥介檯闊虫爣涓殑鏃犲0榻挎懇鎿﹂煶瑗块噷灏斿瓧姣嶇殑Ѳ 鏄粠Theta 鍙樻潵銆傚畠杩樻槸涓栫晫鍦扮悆鏃ョ殑鏍囧織銆?
回答5:
灞曞紑鍏ㄩ儴
杩欎釜绗﹀彿鏄釜甯岃厞瀛楁瘝锛岃闊筹細sita锛?br />涓€鑸敤鏉ヨ〃绀烘煇涓锛岄偅涓〃绀烘煇涓鐨勬寮?