题目内容
若![](http://thumb.1010pic.com/pic6/res/czsx/web/STSource/20131211103359947037435/SYS201312111033599470374012_ST/0.png)
【答案】分析:根据tan30°=
解答.
解答:解:∵
tan(x+10°)=1,
∴tan(x+10°)=
,
∴x+10°=30°,
∴x=20°.
点评:本题考查的是特殊角的三角函数值,比较简单.
![](http://thumb.1010pic.com/pic6/res/czsx/web/STSource/20131211103359947037435/SYS201312111033599470374012_DA/0.png)
解答:解:∵
![](http://thumb.1010pic.com/pic6/res/czsx/web/STSource/20131211103359947037435/SYS201312111033599470374012_DA/1.png)
∴tan(x+10°)=
![](http://thumb.1010pic.com/pic6/res/czsx/web/STSource/20131211103359947037435/SYS201312111033599470374012_DA/2.png)
∴x+10°=30°,
∴x=20°.
点评:本题考查的是特殊角的三角函数值,比较简单.
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目
若tan(a+10°)=
,则锐角a的度数是( )
3 |
A、20° | B、30° |
C、35° | D、50° |