特殊角30°37°45°53°120°145°150°sin cos tan值答:sin53° =0.799,cos53° =0.602,tan53°=0.754 sin60° =√3/2,cos60° =1/2,tan60° =√3 sin90° =1,cos90° =0,tan90° 无意义 sin120° =√3/2,cos120° =-1/2,tan120° =-√3 sin135° =√2/2,cos135° =-√2/2,tan135° =-1 sin150° =1/2,cos150°...