gostden
2011-11-4 09:41 PM
本帖最后由 gostden 于 2012-4-29 10:50 PM 编辑
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如 tan 147° ,cos 254°40' ,sin 307°25'
gostden 发表于 2011-11-4 09:41 PM
按计算机就可以了啊~~你可以用计算机吗？
PiYo水水 发表于 2011-11-4 10:34 PM
我不是很会用计算机，可以教下怎样用吗？要按什么
gostden 发表于 2011-11-4 11:12 PM
你按tan 147 = ，然后按这个符号“。，，"就可以了~~~
PiYo水水 发表于 2011-11-4 11:54 PM
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