问题
解答题
计算: (1) tan260°-2 cos 30°-cot45°; (2)
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答案
(1) tan260°-2 cos 30°-cot45°
=(
)2-2×3
-13 2
=3-
-13
=2-
;3
(2)
+(-2)2
-10 5
×1 3 6
=2+
-2 2
=2.
计算: (1) tan260°-2 cos 30°-cot45°; (2)
|
(1) tan260°-2 cos 30°-cot45°
=(
)2-2×3
-13 2
=3-
-13
=2-
;3
(2)
+(-2)2
-10 5
×1 3 6
=2+
-2 2
=2.