r=v(-4a)^2+(3a)^2=v16a^2+9a^2=5|a|
sina=3a/5|a|
cosa=-4a/5|a|
a>0,sina=3/5 cosa=-4/5
a
已知角α終邊上一點(diǎn)p(-4a,3a),a≠0
已知角α終邊上一點(diǎn)p(-4a,3a),a≠0
數(shù)學(xué)人氣:422 ℃時(shí)間:2020-06-18 18:03:31
優(yōu)質(zhì)解答
我來回答
類似推薦
- 已知角α終邊上一點(diǎn)P(-4a,3a)(a≠0)
- 已知角α的終邊上有一點(diǎn)的坐標(biāo)是P(3a,4a),其中a≠0,求α的三角函數(shù)值
- 已知角a的終邊經(jīng)過點(diǎn)P(4a,-3a)(a≠0),求2sina+cosa的值
- 已知角x的終邊上有點(diǎn)P(3a,-4a)(a>0),求cosx
- 設(shè)角α的終邊上有一點(diǎn)P(-4a,3a)(a≠0),則2sinα+cosα的值是( ) 怎么求?
- 函數(shù)f(x)=sinx-cosx^2的最小值是?
- 英語(yǔ)翻譯
- I took my grandpa to the hospital this morning,_____ I missed the first class.
- So crazy
- 方差是各個(gè)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(cuò)
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(zhǎng)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