新高考數(shù)學一輪復(fù)習提升訓練5.2 三角公式的運用（精講）（原卷版）

5.2三角公式的運用（精講）（提升版）思維導圖思維導圖考點呈現(xiàn)考點呈現(xiàn)例題剖析例題剖析考點一公式的基本運用【例1-1】（2021·全國·高考真題）若SKIPIF1<0，則SKIPIF1<0（

）A．SKIPIF1<0 B．SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<0【例1-2】（2022·安徽）已知SKIPIF1<0，則SKIPIF1<0（

）A．SKIPIF1<0 B．SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<0【例1-3】（2022·湖南·長郡中學）（多選）下列各式中值為1的是（

）A．SKIPIF1<0 B．SKIPIF1<0C．SKIPIF1<0 D．SKIPIF1<0【一隅三反】1．（2021·全國·高考真題（文））若SKIPIF1<0，則SKIPIF1<0（

）A．SKIPIF1<0 B．SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<02．（2022·江蘇南通·模擬預(yù)測）在△ABC中，若SKIPIF1<0，則SKIPIF1<0（

）A．SKIPIF1<0 B．SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<03．（2021·全國·課時練習）（多選）下列等式成立的是（）A．SKIPIF1<0B．SKIPIF1<0C．SKIPIF1<0D．SKIPIF1<04．（2022·江蘇·泗陽縣實驗高級中學）（多選）已知SKIPIF1<0，則（

）A．SKIPIF1<0 B．SKIPIF1<0C．SKIPIF1<0 D．SKIPIF1<05．（2022·湖南省隆回縣第二中學）已知SKIPIF1<0，則SKIPIF1<0（

）A．-SKIPIF1<0 B．-SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<0考點二角的拼湊【例2-1】（2022·四川成都）若SKIPIF1<0，SKIPIF1<0，則SKIPIF1<0的值為（

）A．SKIPIF1<0 B．SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<0【例2-2】（2021·安徽·高三階段練習（理））已知SKIPIF1<0，則SKIPIF1<0（

）A．SKIPIF1<0 B．SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<0【例2-3】（2022·江蘇）已知SKIPIF1<0，SKIPIF1<0，且SKIPIF1<0，SKIPIF1<0，則SKIPIF1<0（

）A．SKIPIF1<0 B．SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<0【一隅三反】1．（2022·福建南平）若SKIPIF1<0，則SKIPIF1<0（

）A．SKIPIF1<0 B．SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<02．（2022·山東·聊城二中高三開學考試）已知SKIPIF1<0，且SKIPIF1<0，則SKIPIF1<0的值為（

）A．SKIPIF1<0 B．SKIPIF1<0C．SKIPIF1<0 D．SKIPIF1<03．（2021·江蘇·高三階段練習）已知SKIPIF1<0，則SKIPIF1<0（

）A．SKIPIF1<0 B．SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<04．（2021·江蘇·蘇州市相城區(qū)陸慕高級中學高三階段練習）已知SKIPIF1<0，SKIPIF1<0，SKIPIF1<0，則SKIPIF1<0（

）A．SKIPIF1<0 B．SKIPIF1<0C．SKIPIF1<0 D．SKIPIF1<05．（2022·全國·課時練習）已知SKIPIF1<0，SKIPIF1<0，SKIPIF1<0，則SKIPIF1<0________，SKIPIF1<0________．考點三恒等變化【例3】（2022·湖北武漢·高三期末）計算SKIPIF1<0（

）A．1 B．﹣1 C．SKIPIF1<0 D．SKIPIF1<0【一隅三反】1．（2022·全國·高三專題練習）SKIPIF1<0（

）A．SKIPIF1<0 B．SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<02．（2022·河北省唐縣第一中學高三階段練習）已知SKIPIF1<0，則SKIPIF1<0（

）A．SKIPIF1<0 B．SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<03．（2022·西藏）求SKIPIF1<0的值（）A．1 B．3 C．SKIPIF1<0 D．SKIPIF1<0考點四三角公式與其他知識綜合運用【例4-1】（2022·全國·模擬預(yù)測（文））已知SKIPIF1<0在SKIPIF1<0處的切線傾斜角為SKIPIF1<0，則SKIPIF1<0的值為（

）A．7 B．SKIPIF1<0 C．5 D．-3【例4-2】（2022·福建·廈門雙十中學）如圖1，正方形ABCD的邊長為2，點M為線段CD的中點.現(xiàn)把正方形紙按照圖2進行折疊，使點A與點M重合，折痕與AD交于點E，與BC交于點F.記SKIPIF1<0，則SKIPIF1<0_______.【一隅三反】1．（2022·湖南·長沙市明德中學高三階段練習）已知SKIPIF1<0，設(shè)SKIPIF1<0，SKIPIF1<0，SKIPIF1<0，則a，b，c的大小關(guān)系是（

）A．SKIPIF1<0 B．SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<02．（2021·河北·張家口市宣化第一中學）在直角坐標系中，SKIPIF1<0的頂點SKIPIF1<0