2025年教学资料:4.5 诱导公式(第2课时)(分层作业)(解析版)
4.5诱导公式(第2课时)分层作业1.cos150°=( B )A.B.-C.D.-[解析] cos150°=cos(180°-30°)=-cos30°=-.2.的值为()A.B.C.D.【答案】D【分析】利用诱导公式,结合特殊角的三角函数值求解作答.【详解】依题意,.故选:D3.的值是()A.B.C.D.【答案】A【分析】利用诱导公式进行求解.【详解】.故选:A.4.=()基础巩固A.-B.C.-D.【答案】D【分析】利用诱导公式即可求出结果.【详解】因为,所以,故选:D.5.若.则.【答案】【分析】化简已知条件即可得出的值.【详解】由题意,,解得:,故答案为:.6.求值:(1);(2);(...
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