Question

I need help in math can you please help me

Answer 1

`\begin{gathered} (1+\tan^2(u))/(1-\tan^2(u))=(1+(\sin^2(u))/(\cos^2(u)))/(1-(\sin^2(u))/(\cos^2(u))) \\ \\ \end{gathered}`

Fill first blank with:

`\sin ^2(u)`
`(1+(\sin^2(u))/(\cos^2(u)))/(1-(\sin^2(u))/(\cos^2(u)))*(\cos^2(u))/(\cos^2(u))=((\cos ^2(u)+\sin ^2(u))/(\cos ^2(u))*\cos ^2(u))/((\cos ^2(u)-\sin ^2(u))/(\cos ^2(u))*\cos ^2(u))=(\cos ^2(u)+\sin ^2(u))/(\cos ^2(u)-\sin ^2(u))`

Fill second blank with:

`\sin ^2(u)`