You are Here: Home >< Maths

# Trig watch

Announcements
1. secx=3tanx

i got cosx=0 and sinx=1/3

The mark scheme has missed out cosx, isn't cosx=0 a valid solution?
2. No lol, if you divide by 0 the world ends.
3. Think about trig identitis. You should only get the one answer.

Posted from TSR Mobile
Attached Images

4. (Original post by Tynos)
secx=3tanx

i got cosx=0 and sinx=1/3

The mark scheme has missed out cosx, isn't cosx=0 a valid solution?
secx and tanx do not exist when cosx=0
5. (Original post by MarkProbio)

Posted from TSR Mobile

how is this any different from cotxcosecx=6cotx

diving by cotx means you lost a solution.
6. ..
7. (Original post by Tynos)
how is this any different from cotxcosecx=6cotx

diving by cotx means you lost a solution.
No idea what you mean sorry. The answer is sin x=1/3 unless I'm answering a different question to the one I think you're asking.

Posted from TSR Mobile

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: October 9, 2013
Today on TSR

Choose Respect

### University open days

• Manchester Metropolitan University
Wed, 14 Nov '18
• University of Chester
Wed, 14 Nov '18
• Anglia Ruskin University
Ambitious, driven, developing your career & employability? Aspiring in your field, up-skilling after a career break? Then our Postgrad Open Evening is for you. Postgraduate
Wed, 14 Nov '18
Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams