Question

How do you prove `cos^2A csc A sec A = cot A`?

Answer 1

It can be proven using identities:

`cscA=1/sinA`

`secA=1/cosA`

`cotA=cosA/sinA`

See explanation.

Explanation:

`L=cos^2A*cscA*secA=cos^2A*(1/sinA)*(1/cosA)=cosA/sinA=cotA=R`