题目内容
求值
(1)
sin60°-tan30°•cos30°;
(2)
.
(1)
3 |
(2)
2sin60°+tan45° |
tan60°+2sin30° |
(1)原式=
×
-
×
,
=
-
,
=1;
(2)原式=
,
=
,
=1.
3 |
| ||
2 |
| ||
3 |
| ||
2 |
=
3 |
2 |
1 |
2 |
=1;
(2)原式=
2×
| ||||
|
=
| ||
|
=1.
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