原式=(-sina)(tana)(-cota)/[(-cosa)(-tana)]
=sina/(cosa×sina/cosa)
=sina/sina
=1
【sin(2π-a)tan(π+a)cot(-a-π）】/cos(π-a)tan(3π-a)
【sin(2π-a)tan(π+a)cot(-a-π）】/cos(π-a)tan(3π-a)
數(shù)學(xué)人氣：910 ℃時間：2020-03-11 15:22:49
優(yōu)質(zhì)解答
我來回答
類似推薦
- sin,cos,tan,cot,分別是哪邊對哪邊
- 1+tanα/1-tanα=3+2√2,求(sinα+cosα)2-1/cotα-sinαcosα的值
- 若sinθ+cosθ=1/3,求tanθ+cotθ.
- sin^2(a+π) cos(π+a) cot(-a-2π) /tan(π+a) cos^3(-a-π)
- sincos tan cot 數(shù)學(xué)中的為何物
- 函數(shù)f(x)=sinx-cosx^2的最小值是?
- 英語翻譯
- I took my grandpa to the hospital this morning,_____ I missed the first class.
- So crazy
- 方差是各個數(shù)據(jù)與平均數(shù)之差的平方的平均數(shù)
- 函數(shù)y=f(x)與它反函數(shù)y=f^-1(x)怎么讀?
- These are photos of my families.Look at them 改錯
猜你喜歡
- 1平面與平面重合,是否屬于平行一類?那重合的兩直線,也屬于平行一類的嗎?
- 2非洲每年因饑餓死亡的人數(shù)及現(xiàn)在饑餓人口數(shù)量拜托各位了 3Q
- 3decide to do sth.還=什么
- 4(7/8)o you think of london?B:5.____london is one of the liveliest cities
- 5啤酒可以托運(yùn)嗎
- 6邊長為2√6的等邊三角形的中心到一邊的距離為?
- 7please give your hand to help me
- 8已知2的X次方等于3的Y次方等于6的Z次方不等等于1,證明X分之一加Y分之一等于Z分之一.
- 9幫我做做?
- 10機(jī)械分析天平TG628A的使用說明書
- 11in winter ,we wear warm coats to protect our bodies_.
- 12( )was most importance to her ,she told me,was her family it this what as