(tan60°-2tan45°)分之(2sin60°-1)(tan60°-2tan45°)分之(2sin60°-1)
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(tan60°-2tan45°)分之(2sin60°-1)(tan60°-2tan45°)分之(2sin60°-1)(tan60°-2tan45°)分之(2sin60°-1)(tan60°-2tan4
(tan60°-2tan45°)分之(2sin60°-1)(tan60°-2tan45°)分之(2sin60°-1)
(tan60°-2tan45°)分之(2sin60°-1)
(tan60°-2tan45°)分之(2sin60°-1)
(tan60°-2tan45°)分之(2sin60°-1)(tan60°-2tan45°)分之(2sin60°-1)
(2sin60°-1)/(tan60°-2tan45°)
=[2*(√3/2)-1]/(√3-2)
=(√3-1)/(√3-2)
=-(√3-1)(√3+2)/(-1) 【分母有理化】
=-3-2√3+√3+2
=-1-√3
(tan60°-2tan45°)分之(2sin60°-1)
=(2×√3/2-1)/(√3-2)
=(√3-1)/(√3-2)
=-(√3-1)(√3+2)
=-3-2√3+√3+2
=-1-√3
(根3-2)除以(根3-1)=(1减根3)除以2
(tan60°-2tan45°)分之(2sin60°-1)(tan60°-2tan45°)分之(2sin60°-1)
三角函数tan60°-tan45°/tan45°+tan60°+2sin60°如上,
cos^245°+1/2tan45°-tan60°分之tan30°-sin60°
2cos30°-tan45°-√(1-tan60°)^2
2cos30°+tan45°-tan60°+(根号2-1)
sin²45°-cos60°- tan45°分之cos30° +2sin²60°乘tan60°
根号【cos45°-cos30°】*2-tan60°分之tan45°+sin45°wohji,大哥大姐帮帮忙噻
cos30°-sin45°/(sin60°+cos45°) +(tan45°+tan60°)/tan45°-tan60°
计算:(sin平方45°+tan60°×cos30°)/(2cos45°+tan45°)等于多少?
3|tan30°-1|+sin平方60°-(cos60°-1)负2次方*tan45°+tan60°=?
关于锐角三角函数计算 急用 |tan45°-tan60°|+根号下(sin² 60°- 2cos30°+1)
sin30°·tan45°+根号2·cos45°+sin60°·tan60°
sin²30°+2sin60°+tan45°-tan60°+cos²30°
sin²25°+2sin60°+tan45°-tan60°+cos²25°=
sin²30°+2sin60°+tan45°-tan60°+cos²30°
sin^230°+2sin^260°+tan45°-tan60°+cos^230°=
sin60°+√2cos45°/(0.5*cos30°-tan45°)+4tan60°=?
求值sin30°,tan45°+根号2,cos45°+sin60,tan60°,分别求出,