人教B版(2019)必修第三冊(cè)《7.2.4 誘導(dǎo)公式》2021年同步練習(xí)卷(4)
發(fā)布:2024/12/23 18:0:2
一、單選題
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1.已知
,則sinα=( ?。?/h2>sin(π+α)=54組卷:408引用:4難度:0.8 -
2.sin2021°可化簡(jiǎn)為( ?。?/h2>
組卷:544引用:2難度:0.8 -
3.
的值為( ?。?/h2>tan17π6組卷:728引用:4難度:0.9 -
4.若
,則cos(π3-α)=35=( )sin(π6+α)組卷:402引用:7難度:0.8 -
5.sin300°+tan600°的值是 ( ?。?/h2>
組卷:71引用:4難度:0.9
二、解答題
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15.已知α為第三象限角,且f(α)=
.sin(3π2-α)cos(π2-α)tan(-α+π)sin(π2+α)tan(2π-α)
(1)化簡(jiǎn)f(α);
(2)若α=-π,求f(α)的值.323
(3)若f(α)=,求cos(π+α)的值.265組卷:1139引用:4難度:0.5 -
16.已知
.f(α)=sin(2π-α)cos(π+α)cos(π2-α)cos(11π2-α)sin(3π-α)cos(π2+α)sin(9π2+α)+cos(2π-α)
(1)化簡(jiǎn)f(α);
(2)若,求f(α)=55的值.1sinα+1cosα組卷:1463引用:5難度:0.5