(cosx/1 + sinx) + (cosx/1-sinx)=

(cosx(1-sinx)+cosx(1+sinx))/(1-sin^2x)=

(cosx-sinxcosx+cosx+sinxcosx)/cos^2x=

2cosx/cos^2x=

2/cosx=

2secx=2secx

## We’ll help your grades soar

Start your 48-hour free trial and unlock all the summaries, Q&A, and analyses you need to get better grades now.

- 30,000+ book summaries
- 20% study tools discount
- Ad-free content
- PDF downloads
- 300,000+ answers
- 5-star customer support

Already a member? Log in here.

Are you a teacher? Sign up now