(2001•昆明)4cos60°-2tan45°= .
考点分析:
相关试题推荐
(2001•宁夏)在△ABC中,∠C为直角,如果∠A=60°,那么∠A的对边与斜边的比值是
.
查看答案
(2001•青海)在△ABC中,已知∠A=74°37′,∠B=60°23′,那么∠C=
度;sinC+cosC=
.
查看答案
(2001•山东)计算:2sin60°-(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232654576300521/SYS201310212326545763005007_ST/0.png)
)
-1-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232654576300521/SYS201310212326545763005007_ST/1.png)
=
.
查看答案
(2001•陕西)在△ABC中,∠C为直角,若3AC=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232654576300521/SYS201310212326545763005006_ST/0.png)
BC,则∠A的度数是
度,cosB的值是
.
查看答案
(2001•四川)计算:
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232654576300521/SYS201310212326545763005005_ST/0.png)
=
.
查看答案