You are Here: Home >< Maths

# Trigonometry help

Announcements Posted on
Last day to win £100 of Amazon vouchers - don't miss out! Take our quick survey to enter 24-10-2016

A, B and C are three points which lie in a straight line on horizontal ground.

The angle of elevation of T from A is 21.5.
The angle of elevation of T from C is 13.3.
AC = 1200 m.
Calculate the height of the tower.
2. you could try breaking the base edge down into b and 1200-b
then you can get two equations with two unknowns (b and the height of the tower)
3. Break it down into B and 1200-b and use Tan with the respective angles to find the unknown.

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. Oops, you need to agree to our Ts&Cs to register

Updated: May 3, 2012
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:
Today on TSR

### How does exam reform affect you?

From GCSE to A level, it's all changing

Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read here first

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams