How do you simplify the expression (sec^2theta-1)/sec^2theta?

1 Answer
Oct 30, 2016

=>(1/cos^2theta - 1)/(1/cos^2theta)

=> (1/cos^2theta - cos^2theta/cos^2theta)/(1/cos^2theta)

=>((1 - cos^2theta)/cos^2theta)/(1/cos^2theta)

We use the identity sin^2beta + cos^2beta = 1-> sin^2beta = 1 - cos^2beta.

=>(sin^2theta)/cos^2theta xx cos^2theta/1

=>sin^2theta

Hopefully this helps!