2025年教学资料:4.3.2 单位圆与三角函数(分层作业)(解析版)
4.3.2单位圆与三角函数分层作业1.的值等于( )A.B.C.D.【答案】B【分析】根据特殊角的三角函数值求解即可.【详解】根据特殊角的三角函数值可得.故选:B2.( )A.1B.C.D.【答案】A【分析】利用特殊角三角函数值求解.【详解】由特殊角的正切值知,故选:A3.若且,则角是第象限角.【答案】四【分析】根据三角函数在各象限的符号,即可求解.【详解】根据三角函数在各象限的符号,由且,可得在第四象限.故答案为:四.4.(填)基础巩固【答案】【分析】直接判定角所在象限及其正负即可.【详解】在第二象限,,在第四象限,,,故答案为:.5.若且,则是第象限角.【答案】二【分析】根据各...
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