计算:sin(-1665°)+cos(-330°)-tan1200°

计算:sin(-1665°)+cos(-330°)-tan1200° 计算：sin^67.5°-cos^67.5度 电脑怎么计算cos,sin 计算sin(-1665°)+cos(-330°)-tan1200°.要过程. 计算：cos²60° +sin²60° 计算cos^2*105°-sin^2*105° 计算：sin(-1200°)×cos1230°+cos(-1020°)sin(-1050°)+tan1305° 计算：sin（3π /4 ) +cos (2π /3) - sin 150° + cos135°=? 计算：cos(70°+α)sin(170°-α)-sin(70°+α)cos(10°+α) 计算 cos(40° +A)*sin(10°+A)+sin(40°+A)*cos(170°-A) 计算：⑴cos^2 30°+sin^2 30°-tan45° ⑵cos30°-sin°45/sin°60-Cos°45.务必要有计算过程! 直角三角形sin cos tan cot 计算 计算；sin420*cos750+sin[-690]]*cos[-660] 计算sin兀/8cos兀/8 计算cosπ/12*sinπ/12 计算[3/(sin^2)20°-[1/(cos^2)20°]+64(sin^2)20°计算[3/(sin^2)20°]-[1/(cos^2)20°]+64(sin^2)20° sin平方A+cos平方A+sin A+cos A-1/sin平方A-cos平方A怎么计算 计算：sin(-1200°）·cos1230°+cos（-1020°）sin(-1050°）+tan1305°