CotOCSCOtan^2= secO

Question

How do I prove this is equal to sec O (theta)

Answer 1

Work out the left side using your identities.

 

(cosx / sinx)(1 / sinx)(sin²x / cos²x)

 

 

Start cancelling out terms to simply.  If you get (1 / cosx) in the end, then you have proven the identity.