sin(-1200°)cos1290°+cos(-1020°）sin（-1050°)+tan855求值..

sin(-1200°)-cos1290°+cos(-120)°+cos(-1020)°-sin(-1050°)+tan855° 求sin(-1200°）×cos1290°+cos9-1020°)×sin（-1500°）+tan945° 求sin(-1200°）×cos1290°+cos9-1020°)×sin（-1500°）+tan95° sin(-1200°)cos1290°+cos(-1020°）sin（-1050°)+tan855求值.. 求sin(-1200°)×cos1290°+cos(-1020°)×sin(-1050°)的值求解求解吖~~~~ 求sin(―1200°)·cos1290°+cos(―1020°)·sin(―1050°)+tan945°的值． 求sin﹙-1200°﹚·cos1290+cos﹙-1020°﹚·sin﹙-1050°﹚+tan945°的值 求音乐：sin( 1200度)cos1290度 cos( 1020度)in( 1050度)+tan495度 sin(10°)+sin(50°)-sin(70°) =sin(10°)+sin(50°)-sin(70°) = sin(-1200°)的值是多少? sin(18°)sin(54°)sin(18°)*sin(54°) 不用计算器 sin?°≈0.6773? sin 15°是多少 sin²1°+sin²2°+sin²3°+.+sin²89 化简:sin^A*sin^A+sin(A-60°)*sin(A-60°)+sin(A+60°)* sin(-1200°）.cos1209°+cos（-1020°)-sin(-1050°）+tan855° 计算：sin(-1200°)×cos1230°+cos(-1020°)sin(-1050°)+tan1305° 计算:sin方10°+sin方20°+sin方30°+sin方40°+sin方50°+sin方60°+sin方70°+sin方80°+sin方90°=