中考数学初中三角函数计算题30 45 60sin 21223cos 31tan 1 3(1)sin 260cos 260 (2) -tan450o45sinc(3)cos45sin30 (4)sin 2300+cos2300(5)tan45sin30cos60 (6) 023tan45cos(7)2sin300cos45 0 (6)sin600cos600 (8)2sin30+3cos60-4tan45 (9)cos30sin45+sin30cos45 (10) 0045tan26t1si(11) cos30+ sin45 (12)2sin30 0+3sin6004tan45 0 32三角函数值三角函数(13)tan30 0sin450+tan600cos450 (14) 0045tan26t13si(15) ;_60cot45tan_,60cos3sin00 (16) =_3si3t145si22(17) 0045tan3t1(18) )60sin45(co30sin6co2345sin00(19)sin 230+cos245+ sin60tan45; (20) + 22cos306tantsin45