题目
题型:不详难度:来源:
(1)2sin30°+cot60°-
tan260° |
cot230° |
(2)|tan45°-tan60°|+
sin260°-2cos30°+1 |
答案
| ||
3 |
=1+
| ||
3 |
=
3+
| ||
3 |
(2)原式=
3 |
(sin60°-1)2 |
=
3 |
| ||
2 |
=
3 |
| ||
2 |
=
| ||
2 |
核心考点
试题【计算:(1)2sin30°+cot60°-tan260°cot230°+(-cot45°)2008(2)|tan45°-tan60°|+sin260°-2cos】;主要考察你对特殊角三角函数值等知识点的理解。[详细]
举一反三
A.1 | B.2 | C.
| D.
|
(sin60°-1)2 |