问题
解答题
计算：cos30°•tan30°+sin60°•tan45°•tan60°．
答案
解；原式=
×3 2
+3 3
×1×3 2 3
=
+1 2 3 2
=2．
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计算：cos30°•tan30°+sin60°•tan45°•tan60°．
解；原式=
×3 2
+3 3
×1×3 2 3
=
+1 2 3 2
=2．