tan(2α-α)=(tan2α-tanα)/(1+tanαtan2α),tanαtan2α=(tan2α-tanα)/tanα-1
tan2αtan3α=(tan3α-tan2α)/tanα-1┄┈┈tan(n-1)αtan(nα)=(tan(nα)-tan(n-1)α)/tanα-1
tanαtan2α+tan2αtan3α+……+tan(n-1)αtan(nα)=(tan2α-tanα)/tanα-1+(tan3α-tan2α)/tanα-1+┄┄┄+(tan(nα)-tan(n-1)α)/tanα-1=(tan(nα)-tanα)/tanα-(n-1)=tan(nα)/tanα-1+n-1=tan(nα)/tanα-n
证明:tanαtan2α+tan2αtan3α+……+tan(n-1)αtan(nα)=tan(nα)/tanα-n
证明:tanαtan2α+tan2αtan3α+……+tan(n-1)αtan(nα)=tan(nα)/tanα-n
数学人气:420 ℃时间:2020-05-11 15:09:19
优质解答
我来回答
类似推荐
猜你喜欢
- 1(-3a^4 bc)乘(-2a^3 c^2)
- 2帮忙找一下“一元一次不等式组”的计算题和答案,还有“二元一次不等式组”的计算题和答案!
- 3初一数学题一元一次方程
- 4不改变分式的值,使下列分式的分子与分母都不含“-”号
- 5根据意思写词语形容形势万分危机
- 6My grand parents are (very well.)就括号部分提问
- 7高等数学中,导数和极限是不是一样?左右导数和左右极限是不是又是一样的?请详细说说两者的区别和共同点
- 81000四年级小数加减乘除法题
- 9He was asked to show her the same respect __ they would to me.
- 10this is the novel that is written by Guo Jingming那个that要不要?