Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.1.1 第2课时一选择题1.已知2弧度的圆心角所对的弦长为2那么这个圆心角所对的弧长是( )A.2 B.sin2C.eq f(2sin1) D.2sin1[答案] C[解析] 如图∠AOB2弧度过O点作OC⊥AB于C并延长O
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.1.2 第1课时一选择题1.如果α的终边过点P(2sin30°-2cos30°)则sinα的值等于( )A.eq f(12) B.-eq f(12) C.-eq f(r(3)2) D.-eq f(r(3)3)[
[分析] 将使函数有意义的条件组成不等式组则不等式组的解集即为所求函数的定义域.6.点P(tan2007°cos2007°)位于__________.[答案] 第四象限[解析] 2007°360°×5207°是第三象限角.∴tan2007°>0cos2007°<0.故P点位于第四象限.
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.1.2 第2课时一选择题1.下列命题中为真命题的是( )A.三角形的内角必是第一象限角或第二象限角B.角α的终边在x轴上时角α的正弦线正切线分别变成一个点C.终边在第二象限的角是钝角D.终边相同的角必然相等[答案] B[解析] 三角形的内角
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.1.3 第2课时一选择题1.已知sin(α-eq f(π4))eq f(13)则cos(eq f(π4)α)的值为( )A.eq f(2r(2)3) B.-eq f(2r(2)3)C.eq f(13)
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.1.4 第2课时一选择题1.函数y5sineq blc(rc)(avs4alco1(f(25)xf(π6)))的最小正周期是( )A.eq f(25)π B.eq f(52)π C.eq f(π3) D.
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.1.2 第3课时一选择题1.(09·陕西文)若tanα2则eq f(2sinα-cosαsinα2cosα) 的值为( )A.0 B.eq f(34) C.1 D.eq f(54)[答案] B[解析] 原式
2.B[解析] aeq r(2)sin(14°45°)eq r(2)sin59°beq r(2)sin(16°45°)eq r(2)sin61°ceq r(2)·eq f(r(3)2)eq r(2)sin60°由ysinx在(0°90°)上单调增知:a<c<. A[解析] eq r(2)sineq blc(rc)(avs4alco1(f(π4)-x))eq r
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.1.4 第1课时一选择题1.如果sinα·tanα<0且sinαcosα∈(01)那么角α的终边在( )A.第一象限 B.第二象限C.第三象限 D.第四象限[答案] B[解析] ∵sinα·tanα<0∴α是第二或第三象限角又∵sinαc
Evaluation Only. Created with Aspose.Words. Copyright 2003-2022 Aspose Pty Ltd.1.3 第1课时一选择题1.(07·湖北)tan690°的值为( )A.-eq f(r(3)3) B.eq f(r(3)3)C.eq r(3) D.-eq r(3)[答案] A[解析] tan690°tan
违法有害信息,请在下方选择原因提交举报