tan60°的值为（ ） A． 3 3 B． 3 C．1 D． 1
\u8ba1\u7b97cos30\u00b0+ 3 3 tan60\u00b0 \u7684\u503c\u662f\uff08\u3000\u3000\uff09 A\uff0e 7 2 B\uff0e 5\u539f\u5f0f= 3 2 + 3 3 \u00d7 3 = 3 2 +1= 3 +2 2 \uff0e\u6545\u9009D\uff0e
\u5982\u679c\u4f60\u8bf4\u7684A=tan60\u00b0\u662fA=60\u00b0\u7684\u8bdd\uff0cc=1
tan60°=
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