cos(-79/6∏)=?cos(-79/6∏)=(∏+12∏+1/6∏)=继续写,别把上面的合了,就这样接下来写
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/08 20:57:03
![cos(-79/6∏)=?cos(-79/6∏)=(∏+12∏+1/6∏)=继续写,别把上面的合了,就这样接下来写](/uploads/image/z/7618471-7-1.jpg?t=cos%28-79%2F6%E2%88%8F%29%3D%3Fcos%28-79%2F6%E2%88%8F%29%3D%28%E2%88%8F%2B12%E2%88%8F%2B1%2F6%E2%88%8F%29%EF%BC%9D%E7%BB%A7%E7%BB%AD%E5%86%99%2C%E5%88%AB%E6%8A%8A%E4%B8%8A%E9%9D%A2%E7%9A%84%E5%90%88%E4%BA%86%2C%E5%B0%B1%E8%BF%99%E6%A0%B7%E6%8E%A5%E4%B8%8B%E6%9D%A5%E5%86%99)
x)K/57{ѯik چF`"~绗?߽iLuu=rZNxM醍/|`Ovt?&H.L1[@4yopyM7zd [P;o77/.H̳ Yڰ
cos(-79/6∏)=?cos(-79/6∏)=(∏+12∏+1/6∏)=继续写,别把上面的合了,就这样接下来写
cos(-79/6∏)=?
cos(-79/6∏)
=(∏+12∏+1/6∏)
=
继续写,别把上面的合了,就这样接下来写
cos(-79/6∏)=?cos(-79/6∏)=(∏+12∏+1/6∏)=继续写,别把上面的合了,就这样接下来写
cos(-79/6∏)
=(∏+12∏+1/6∏)
= cos(∏+1/6∏) =cos(-1/6∏)=-根号3/2
cos(-79兀/6)
cos
cos(-79π/6)的计算过程
tan(-2010°)+cos(-79π/6)
cos(-19/6∏)=
cos(-7/6)∏=
1+cos(2θ)+cos(4θ)+cos(6θ)=4cosθcos(2θ)cos(3θ)证明相等.
化简cos(π/6a)+cos(π/6-a)=
cos(π/7) + cos(6π/7) =几
cos²兀/6=
cos(-19/6π)=?
cos(-19/6n)=
若sinα+cosβ=2/3 cosα+cosβ=5/6求cos(α-β)
sinα+cosα=1,求cos^2α+cos^6α+cos^8α的值.
化简(1-sin^6 a-cos^6 a)/(cos^2 a-cos^4 a)==
Sina+sin^2a=1,cos^2a+cos^s4a+cos^6a
cos 2π/7 +cos 4π/7 +cos 6π/7=?
请问cos(2π/7)+cos(4π/7)+cos(6π/7)=?,