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If x=ev secu, y=ev tanu find j(u,vx,y)
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written 3.9 years ago by |
x=evsecu xu=evsecutanu xv=evsecu y=evtanu yu=evsec2u yv=evtanu J(x,yu,v)=∂(x,y)∂(u,v)|∂x∂u∂x∂v ∂y∂u∂y∂v|=|xuxv\yuyv|=xuyv−xv−yu =evsecutanu×evtanu−evsecu evsec2u =e2vsecu(tan2u−sec2u)=−e2vsecu j(u,vx,y)=1j(x,yu,v)=1−e2vsecu ∴, j(u,vx,y)=−e−2vcosu