Marisol V.
asked 03/12/15cosx/1+sinx + 1+sinx/cosx = 2sec
I'd like to know how to solve this problem
We are learning trigonometric identities
More
1 Expert Answer
Mark M. answered 03/12/15
Tutor
4.9
(952)
Retired math prof. Very extensive Precalculus tutoring experience.
cosx + 1 + sinx
1 + sinx cosx
= cos2x + (1 + sinx)2
(1 + sinx)(cosx)
= cos2x + 1 + 2sinx + sin2x
(1 + sinx)(cosx)
= 2 + 2sinx
(1 + sinx)(cosx)
= 2(1 + sinx)
(1 + sinx)(cosx)
= 2
cosx
= 2secx
Still looking for help? Get the right answer, fast.
Ask a question for free
Get a free answer to a quick problem.
Most questions answered within 4 hours.
OR
Find an Online Tutor Now
Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.
Michael J.
03/12/15