Maybe you could get a part-time job in the evening.
新版高中数学人教A版必修4习题:第一章三角函数 1-3-2 含解
析-2019最新整理
课时过关·能力提升 基础巩固
1已知sin αA
解析:coα=答案:C
2已知siA.-解
析:siα∈sinα=tanα
答案:A
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Maybe you could get a part-time job in the evening.
3若sin(3π+α)=A.
解析:由已知,得sinα
则coα=答案:A
4化简sin 95°+cos 175°= .
解析:sin95°+cos175°=sin(90°+5°)+cos(180°-5°)=cos5°-cos5°=0. 答案:0
5已知si解析:∵si
∴si答案:
6化
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Maybe you could get a part-time job in the evening.
解析:原
=答案:-1
7求证
证明左,故原等式成立.
8已知角α的终边经过点P(-4,3),解∵角α的终边经过点P(-4,3),
∴tanα∴原α=
9已知sin α解∵sinαα=
∴tanα∴原式=tanα
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新版高中数学人教A版必修4习题:第一章三角函数 1-3-2 含解析-2019最新整理
Maybeyoucouldgetapart-timejobintheevening.新版高中数学人教A版必修4习题:第一章三角函数1-3-2含解析-2019最新整理课时过关·能力提升基础巩固1已知sinαA解析:coα=答案:C
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