Question

Tan 81 degree = cot _?__

Answer 1

Given:

Tan 81 degree

Required:

tan 81 degree = cot _?__

Step-by-step explanation:

`\begin{gathered} tan\text{ 81}\degree=cot9 \\ \\ tan(90-x)=cotx \\ \\ or\text{ we can also solve like this tan81}\degree \\ \\ cot(90\degree-81\degree)=cot9\degree \end{gathered}`

Required answer:

`tan81\degree=cot9\degree`