满分5 > 高中数学试题 >

.化简: (1) =________; (2)sin2(-α)-tan(360°...

.化简:

(1) 6ec8aac122bd4f6e=________;

(2)sin2(-α)-tan(360°-α)tan(-α)-sin(180°-α)cos(360°-α)tan(180°+α)=________;

(3) 6ec8aac122bd4f6e=________.

 

(1)-tanα (2)-tan2α (3)tan2α 【解析】(1)原式= =-tanα. (2)原式=sin2α-(-tanα)·(-tanα)-sinα·cosα·tanα=-tan2α. (3)原式==tan2α.
复制答案
考点分析:
相关试题推荐

sin6ec8aac122bd4f6e,cos6ec8aac122bd4f6e,tan6ec8aac122bd4f6e,从小到大的顺序是________.

 

查看答案

若|sin(4π-α)|=sin(π+α),则角α的取值范围是________.

[答案] [2kπ-π,2kπ],(kZ)

[解析] ∵|sin(4π-α)|=sin(π+α),

∴|sinα|=-sinα,∴sinα≤0,

∴2kπ-π≤α≤2kπ,kZ.

 

查看答案

若sin6ec8aac122bd4f6e6ec8aac122bd4f6e,则sin6ec8aac122bd4f6e=________.

 

查看答案

设tan(5π+α)=m(αkπ+6ec8aac122bd4f6ekZ),则

6ec8aac122bd4f6e的值为(  )

A. 6ec8aac122bd4f6e             B. 6ec8aac122bd4f6e  

C.-1            D.1

 

查看答案

(2010·全国卷Ⅰ理,2)设cos(-80°)=k,那么tan100°=(  )

A. 6ec8aac122bd4f6e             B.-6ec8aac122bd4f6e

C. 6ec8aac122bd4f6e             D.-6ec8aac122bd4f6e

 

查看答案
试题属性

Copyright @ 2008-2019 满分5 学习网 ManFen5.COM. All Rights Reserved.