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(考试时间 :2 0 0 2年 8月 1 3日上午 8:3 0 - 1 1 :3 0 )注意 :考试中需要下列工具 :计算器、圆规、直尺 .参考公式 :三角形的面积ｋ =12 ａｂｓｉｎＣ两角和与差的三角函数ｓｉｎ(Ａ +Ｂ) =ｓｉｎＡｃｏｓＢ +ｃｏｓＡｓｉｎＢｃｏｓ(Ａ +Ｂ) =ｃｏｓＡｃｏｓＢ -ｓｉｎＡｓ
(Examination time: August 8th, 2008, 8:3 am - 1 1 :3 0) Note: The following tools are required in the exam: calculator, compass, ruler. Reference formula: area of triangle k = 12 absinC two-corner sum and difference trigonometric function sin(A + B) =sinAcosB +cosAsinBcos(A +B) =cosAcosB -sinAs