题目内容
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分析:分别把sin60°=
,cos45°=
,tan45°=1,tan30°=
代入原式计算即可.
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解答:解:原式=
×(
)2+
×(
)2-1×
=
×
+
×
-
=
+
-
=
+
.
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=
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| 1 |
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=
3
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=
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| 24 |
点评:本题考查的是特殊角的三角函数值,属较简单题目.
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