2sin^245°-tan330°×tan405°
1个回答
2sin^2×45°-tan330°×tan405
=2×1/2+tan30°×tan45°
=1+三分之根号下3
相关问题
2cos245°-tan60°×tan30°=?
sina(-1770°)×cos1500°+cos(-690°)×sin780°+tan405°=
计算:tan30°•sin60°+cos230°-sin245°•tan45°.
sin420°×cos390°×tan405°等于多少要过程啊
计算:(1) 2sin230°•tan30°+cos60°•tan60°;(2) sin245°-t
计算:①tan60°cos30°-sin30°tan45°②sin30°−cos245°+34tan260°+sin26
求值:sin330°tan225°+cos780°tan(-315°)=······
计算:cos245°+sin60°•tan30°.
计算:cos245°+tan60°•sin60°-sin30°.
sin2120°+cos180°+tan45°-cos2(-330°)+sin(-210°)=______.