【sin30°/(sin60°-cos45°)】—(根号下(1—tan60°)²)—tan45°
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【sin30°/(sin60°-cos45°)】—(根号下(1—tan60°)²)—tan45°【sin30°/(sin60°-cos45°)】—(根号下(1—tan60°)²)—
【sin30°/(sin60°-cos45°)】—(根号下(1—tan60°)²)—tan45°
【sin30°/(sin60°-cos45°)】—(根号下(1—tan60°)²)—tan45°
【sin30°/(sin60°-cos45°)】—(根号下(1—tan60°)²)—tan45°
【sin30°/(sin60°-cos45°)】—(根号下(1—tan60°)²)—tan45°
=(1/2)/[√3/2-√2/2]-√(1-√3)²-1
=1/(√3-√2)-(√3-1)-1
=√3+√2-√3+1-1
=√2
|cos45°-sin60°|+根号sin30°
sin30°/sin60°-tan60°=
tan60°分之sin60°-sin30°
sin30°-sin60°=?
sin30°cos60°+cos30°sin60°=做不来.
sin45°等于多少?sin30°呢?sin60°呢?
sin30°-2sin60°+tan45°怎么算过程
sin30°+sin60°=sin90°吧?
三角函数:比如:sin30°=?sin60°=?这些
sin30+sin30乘于sin60
sin60°×cos60°+sin45°×cos45°-sin30°×cos30°等于多少
sin30° sin45° sin60° cos30° cos45° cos60° 以此类推,都等于多少
3tan°cos30°+tan45°+sin30°-sin60°cos60°怎么解?
求值sin15°*sin30°*sin45°*sin60°*sin75°
sin30°·tan45°+根号2·cos45°+sin60°·tan60°
3tan30°×cos30°+tan45°+sin30°-sin60°求解要过程
tan²30°+2sin60°Xcos45°+sin30°Xcos30°
2sin30°·cos45°-(sin60°)负二次方+根号3tan30°