x Turn on thread page Beta
 You are Here: Home >< Maths

# How would I attempt this trigonometry question? watch

1. The question is in the attachment- question 6ci.

How would I find the length of arc AD when I'm only given the radius? I know that arc length=r*theta but I don't have the angle and I'm not sure how to find it.

Any help would be appreciated. Thanks.
Attached Images
2. C2 Trig Homework 1.pdf (106.7 KB, 690 views)
3. (Original post by jordanwu)
The question is in the attachment- question 6ci.

How would I find the length of arc AD when I'm only given the radius? I know that arc length=r*theta but I don't have the angle and I'm not sure how to find it.

Any help would be appreciated. Thanks.
isn't that found (as a show ...) in part (a) or am I looking at the wrong question
4. (Original post by TeeEm)
isn't that found (as a show ...) in part (a) or am I looking at the wrong question
Yeah it is
5. Sorry guys I forgot that I found the angle in part a so ignore my thread! XD
6. (Original post by jordanwu)
Sorry guys I forgot that I found the angle in part a so ignore my thread! XD

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: January 27, 2015
Today on TSR

### Boyfriend slept with someone else

...we were on a break

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