cos(-派/6)+cos(派- 派/6)cos(2派- 派/6)+cos(3派- 派/6)+……+cos(2010派-
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cos(-派/6)+cos(派- 派/6)cos(2派- 派/6)+cos(3派- 派/6)+……+cos(2010派- 派/6),化...
cos(-派/6)+cos(派- 派/6)cos(2派- 派/6)+cos(3派- 派/6)+……+cos(2010派- 派/6),化简求值
cos(-派/6)+cos(派- 派/6)cos(2派- 派/6)+cos(3派- 派/6)+……+cos(2010派- 派/6),化简求值
![cos(-派/6)+cos(派- 派/6)cos(2派- 派/6)+cos(3派- 派/6)+……+cos(2010派-](/uploads/image/z/6056419-67-9.jpg?t=cos%28-%E6%B4%BE%2F6%29%2Bcos%28%E6%B4%BE-+%E6%B4%BE%2F6%29cos%282%E6%B4%BE-+%E6%B4%BE%2F6%29%2Bcos%283%E6%B4%BE-+%E6%B4%BE%2F6%29%2B%E2%80%A6%E2%80%A6%2Bcos%282010%E6%B4%BE-)
=cos(-30)+cos150+cos(330)+cos510.+cos(2010π-30)
=cos30-cos(30)+cos30-cos30.+cos30
=cos30+0+0+0...+0
=cos30
=√3/2
=cos30-cos(30)+cos30-cos30.+cos30
=cos30+0+0+0...+0
=cos30
=√3/2
cos(-派/6)+cos(派- 派/6)cos(2派- 派/6)+cos(3派- 派/6)+……+cos(2010派-
cos(2派/7)+cos(4派/7)+cos(6派/7)=?
化简:cos(派-派除6)+cos(2派-派除6)+cos(3派-派除6)+.cos(2004派-派除6)结果为?
cos(3分之25派)+sin(-6分之23派)
sin派/6为什么可以等于cos派/3
化简sin(13派/6)+cos(7派/3)-tan(49派/4)
sin(25派/3)+cos(-25派/6)+tan(-29派/4)
化简:[tan(2派-a)sin(-2派-a)cos(6派-a)]/[cos(a-派)sin(5派-a)]
(cot(a+4派)cos(a+派)sin^2(a+3派))/(tan+(派+a)cos^3(-派-a))
cos派等于多少
cos(派-a)=?
负cos.6分之派等于多少