问题 解答题
计算或化简:
(1)
3
cos30°+
2
sin45°;
(2)
tan45°-cos60°
sin60°
•tan 30°.
答案

(1)原式=

3
×
3
2
+
2
×
2
2

=

3
2
+1

=

5
2

(2)原式=

1-
1
2
3
2
×
3
3

=

3
3
×
3
3

=

1
3

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