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y=sin4(x\/4) +cos4(x\/4)化简
这样化简:y=sin4(x\/4) +cos4(x\/4)=[sin2(x\/4) +cos2(x\/4)]的平方—2sin2(x\/4)*cos2(x\/4);y=1—1\/2sin2(x\/2);y=1—1\/2(1\/2—cosx\/2);y=3\/4+1\/4cosx
y=sin^4(x\/4)+cos^4(x\/4) 求导数
正确结果是:y=sin^4(x\/4)+cos^4(x\/4)y'=[sin^4(x\/4)+cos^4(x\/4)]'=4sin^3(x\/4)·cos(x\/4)·1\/4+4cos^3(x\/4)·(-sin(x\/4))·1\/4 化简即可。当然本题还有其他简便方法。
求解(y=sin^4(X\/4)+cos^4(X\/4)的导数)
所以a=14 b=a-4=10 c=a-8=6
y=sin^4 x\/4 + cos^4 x\/4 求导数 ………
=(sinx\/2)\/2 * (-cosx\/2)=(-sinx)\/4 y=(sin^4 x\/4 + cos^4 x\/4)=(sin^2(x\/4)+cos^2(x\/4))²-2sin^2(x\/4)cos^2(x\/4)=1-2sin^2(x\/4)cos^2(x\/4)=1-(1\/2)(sinx\/2)²求导 y=-1\/2 * 2(sinx\/2) *cos(x\/2) *(1\/2)=(-1\/4)sinx ...
求下列函数的导数y=sin四次方x\/4+cos四次方x\/4
显然 (sinx\/4)'=1\/4* cosx\/4,(cosx\/4)'= -1\/4 *sinx\/4 所以 y'=4(sinx\/4)^3 *1\/4* cosx\/4 -4(cosx\/4)^3 *1\/4 *sinx\/4 =(sinx\/4)^3 *cosx\/4 -(cosx\/4)^3 *sinx\/4 =sinx\/4 *cosx\/4 *[(sinx\/4)^2 - (cosx\/4)^2]= 0.5sinx\/2 * (-cosx...
函数y=sin4(4次方)x+cos4(4次方)x的值域是
{sin(x)}^4={1\/2*(1-cos2x)}^2 ,{cos(x)}^4={1\/2*(1+cos2x)}^2 ,因此,两者相加后的结果是1\/4*(2+2(cos(2x))^2),继续化简使用二倍角公式,原式=1\/4*(3+cos(4x)),这样就可以得知,-1<=cos(4x)<=1,2<=3+cos(4x)<=4,所以值域就是(1\/2,1)...
y=sin^4x\/4+cos^4x\/4 求导
y=sin⁴x \/4+cos⁴x \/4 =(1\/4)(sin⁴x+cos⁴x)=(1\/4)(sin⁴x+2sin²xcos²x+cos⁴x)-sin²xcos²x\/2 =(1\/4)(sin²x+cos²x)²-(2sinxcosx)²\/8 =1\/4-sin²(2x)\/8 =(-1\/...
求y = (sinx\/4)^4 + (cosx\/4)^4导数,请列解题过程,多谢
=-1\/4*sinx 或者 y=(sin(x\/4))^4 + (cos(x\/4))^4 =(sin(x\/4))^4 + (cos(x\/4))^4+2(sin(x\/4)*cos(x\/4))^2-2(sin(x\/4)*cos(x\/4))^2 =((sin(x\/4))^2+(cos(x\/4))^2)^2-1\/2*(sin(x\/2))^2 =1-1\/4*(1-cosx)=1\/4*cosx 所以 y'=-1\/4*...
y=sin^4x\/4+cos^4x的导数怎么求
原式=分母为(sin^4x)'(4+cos^4x)-sin^4X(4+COS^4X)'分子为(4+cos^4x)^2 其中sin^4x的导数为4sin^3xcosx,而4+cos^4x的导数为-4cos^3xsinx
如何将y=sin(x+4\/∏)+cos(x+4\/∏)化成y∫2sin(x+2\/∏)
详情见三角函数的辅助角公式。答案在图片上,希望得到采纳,谢谢。愿您学业进步☆⌒_⌒☆