cos(-210°)tan(-240°)+sin(-30°)-tan225°=多少.怎么算
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cos(-210°)tan(-240°)+sin(-30°)-tan225°=多少.怎么算cos(-210°)tan(-240°)+sin(-30°)-tan225°=多少.怎么算cos(-210°)
cos(-210°)tan(-240°)+sin(-30°)-tan225°=多少.怎么算
cos(-210°)tan(-240°)+sin(-30°)-tan225°=多少.怎么算
cos(-210°)tan(-240°)+sin(-30°)-tan225°=多少.怎么算
=-cos(180+30)tan(180+60)-sin30-tan(180+45)
=cos30tan60-sin30-tan45
=0
tan(-150°)cos(-210°)cos(-420°)tan(-600°)/sin(-1050°)
cos(-210)tan(-240)+sin(-30)tan(-225) 都是度数
cos(-210°)tan(-240°)+sin(-30°)-tan225°=多少.怎么算
tan(-2010°)+cos(-79π/6)
tan(-150°)cos(-570°)cos(-1140°)/cot(-240°)sin(-690°)
计算 tan 30°+cos 30°/tan 45°-cos 60° 等于多少
cos^(50°+α)+cos^(40°-α)-tan(30°-α)*tan(60°+α)
计算 tan 30°+cos 30°/tan 45°-cos 60=
求证cos(720°+α)(2/cosα+tanα)(1/cosα-2tanα)=2cosα-3tanα
计算cosπ/3-tanπ/4+3/4tan²π/6-sinπ/6+cos²π/6cosπ/3-tanπ/4+3/4tan²π/6-sinπ/6+cos²π/6[tan(-150°)cos(-210°)cos420°]/cot(-600°)sin(-1050°)cos25/6π+cos25/3π+tan(-25/4π)5sinπ/2+2cos0-3sin3/2π+10cosπtan10°t
计算(1)cosπ/3-tanπ/4+3/4tan²π/6-sinπ/6+cos²π/6cosπ/3-tanπ/4+3/4tan²π/6-sinπ/6+cos²π/6[tan(-150°)cos(-210°)cos420°]/cot(-600°)sin(-1050°)cos25/6π+cos25/3π+tan(-25/4π)5sinπ/2+2cos0-3sin3/2π+10cosπt
化简cos(-210°)乘tan(-120°)+sin240°乘cos150°h结果是
化简sin210°tan(-120°)+cos(-240°)tan420°
计算:4cos(-240°)sin510°*tan(-300°) 要写
210 225 240 330 的三角函数值 sin cos tan
tan675°+cos765°-tan(-300°)+cos(-690°)
cos 60°+sin 45°-tan 30°=?
cos tan sin 30° 45° 60°是多少