(1-sin^6a-cos^6a)/(sin^2a-sin^4a)最好详细点..说一下用了什么方法、没人回答啊 = =不然就关掉了 - -|、、
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/11 05:29:42
![(1-sin^6a-cos^6a)/(sin^2a-sin^4a)最好详细点..说一下用了什么方法、没人回答啊 = =不然就关掉了 - -|、、](/uploads/image/z/66170-2-0.jpg?t=%281-sin%5E6a-cos%5E6a%29%2F%28sin%5E2a-sin%5E4a%29%E6%9C%80%E5%A5%BD%E8%AF%A6%E7%BB%86%E7%82%B9..%E8%AF%B4%E4%B8%80%E4%B8%8B%E7%94%A8%E4%BA%86%E4%BB%80%E4%B9%88%E6%96%B9%E6%B3%95%E3%80%81%E6%B2%A1%E4%BA%BA%E5%9B%9E%E7%AD%94%E5%95%8A+%3D+%3D%E4%B8%8D%E7%84%B6%E5%B0%B1%E5%85%B3%E6%8E%89%E4%BA%86+-+-%7C%E3%80%81%E3%80%81)
x)0-̋3KM/R Q"X$QٜKXM;^dGÓϧx';;Ml
6-|ktj[=ݰig}@=
5@@dTO`U$9`qn/dAsn#6BV\Z`d
(j[m,
Tckj@")@[b9l
u <}
@ܤm]cF 0p Ȧ$ف
J
(1-sin^6a-cos^6a)/(sin^2a-sin^4a)最好详细点..说一下用了什么方法、没人回答啊 = =不然就关掉了 - -|、、
(1-sin^6a-cos^6a)/(sin^2a-sin^4a)
最好详细点..说一下用了什么方法、
没人回答啊 = =
不然就关掉了 - -|、、
(1-sin^6a-cos^6a)/(sin^2a-sin^4a)最好详细点..说一下用了什么方法、没人回答啊 = =不然就关掉了 - -|、、
(1-sin^6α-cos^6α)/(sin²α-sin^4α)={1-[(sin²α+cos²α)(sin^4α-sin²αcos²α+cos^4α)]}/sin²α(1-sin²α)
=[1-(sin^4α-sin²αcos²α+cos^4α)]/sin²αcos²α=[1-(sin^4α+2sin²αcos²α+cos^4α-3sin²αcos²α)/sin²αcos²α={1-[(sin²α +cos²α)²-3sin²αcos²α]}/sin²αcos²α=3.
化简1-sin^4a-cos^4a/1-sin^6a-cos^6a
1-sin^6a-cos^6a分之1-sin^4a-cos^4a 化简
(1-sin^6a-cos^6a)/(1-sin^4a-cos^4a)=?
(1-sin^4a-cos^4a)/(1-sin^6a-cos^6a)
化简(1-sin^6 a-cos^6 a)/(cos^2 a-cos^4 a)==
(1-sin^6a-cos^6a)/(sin^2a-sin^4a)
由cos(a+b)=cos a cos b-sin a sin b cos(a-b)=cos a cos b+sin a sin b解题设a为锐角,证:1、2分之根3乘cos a + 2分之1乘sin a=cos(6分之π-a)2、cos a-sin a=根号2cos(4分之π+a)
化简:(sin^6a+cos^6a-1) / (sin^4ª+cos^4a-1)
Sina+sin^2a=1,cos^2a+cos^s4a+cos^6a
当sinˆa+sin^2a=1求cos^+cos^6的值
=1-(sin^6a+cos^6a) ------(1)=1-(sin^a+cos^a)(sin^4 a-sin^acos6a+cos^4 a) --------(2)由(1)怎么能到(2)呢=1-(sin^6a+cos^6a)=1-(sin^2a+cos^2a)(sin^4 a-sin^2acos^2a+cos^4a)
化简1-cos^4a-sin^4a/1-cos^6-sin^6acos^6应为cos^6a
cosα+cos^2α=1求sin^2a+sin^6a+sin^8a=?
(1-sin(a)^6-cos(a)^6)/(1-sin(a)^4-cos(a)^4) (1-sin(a)^6-cos(a)^6)/(1-sin(a)^4-cos(a)^4)
(1-sin^6 a-cos^6 a)/(1-sin^4 a-cos^4 a)的化简结果
化简[1-cos^4(A)-sin^4(A)]/[1-cos^6(A)-sin^6(A)] 等于多少?
化简[1-cos^4(A)-sin^4(A)]/[1-cos^6(A)-sin^6(A)] 等于多少?
化简[1-cos^4(A)-sin^4(A)]/[1-cos^6(A)-sin^6(A)] 等于多少?急用!