Geometry & Shapes (id: 22a7d620b)

本题目来源于试卷: Geometry & Shapes，类别为 IB数学

[填空题]
1. Expand and simplify z2 f)xu *ga-sj 1n2a6 fmkeq n+$(1+\sqrt{3})^{2} $.  
2. By writing $75^{\circ} $ as $30^{\circ}+45^{\circ}$ , find the value of $\cos 75^{\circ} $.

The following diagram shows the triangle $\mathrm{ABC}$ where $\mathrm{BC}=\sqrt{6}$, $\mathrm{CA}=2 $ and $ \mathrm{A} \hat{\mathrm{C} B}=75^{\circ}$ .   

$\text { 3. Find } \mathrm{AB} \text { in the form } a+\sqrt{b} \text { where } a, b \in \mathbb{Z} \text {. }$   

参考答案:
空格1: 7.46±2%  空格2: 2.38±2%  空格3: 2.73±2% 


本题详细解析:

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