# Trigonometric IntegrationWatch

#1
Integrate (tanx)/(1 + cosx) dx.

Ive tried this so many times but can't get the answer! Help
0
12 years ago
#2
Multiply by (1-cosx)/(1-cosx), then rearrange a little.
0
#3
(Original post by Speleo)
Multiply by (1-cosx)/(1-cosx), then rearrange a little.
I just did that and I get: cosecx(secx - 1). I can't seem to simplify it let alone integrate it.
0
12 years ago
#4
(Original post by shomkin)
Integrate (tanx)/(1 + cosx) dx.

Ive tried this so many times but can't get the answer! Help
tanx/(1 + cosx)
= 1/sinxcosx - cosecx
= 1/(sin(2x)/2) - cosecx
= 2/sin(2x) - cosecx
= 2cosec(2x) - cosecx

standard integral
0
X

new posts
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### University open days

• Cranfield University
Cranfield Forensic MSc Programme Open Day Postgraduate
Thu, 25 Apr '19
• University of the Arts London
Open day: MA Footwear and MA Fashion Artefact Postgraduate
Thu, 25 Apr '19
• Cardiff Metropolitan University
Sat, 27 Apr '19

### Poll

Join the discussion

#### Have you registered to vote?

Yes! (264)
39.05%
No - but I will (46)
6.8%
No - I don't want to (51)
7.54%
No - I can't vote (<18, not in UK, etc) (315)
46.6%