You are Here: Home >< A-levels

# Need help for math watch

1. Help me!
I don't know how to do this question:
The height of a tide can be model by the function in the form of h=a cos(bt)+c, h is the height in metre and t is the time after midnight, a, b and c are constant, find the value of a,b and c.

Tide height. Time after midnight
12. 0
2. 6:00
12. 12:00
2. 18:00

The answer on the book said a=5, b=30 and c=7
But I get stuck on b=0, can any one help
2. (Original post by HGFER)
Help me!
I don't know how to do this question:
The height of a tide can be model by the function in the form of h=a cos(bt)+c, h is the height in metre and t is the time after midnight, a, b and c are constant, find the value of a,b and c.

Tide height. Time after midnight
12. 0
2. 6:00
12. 12:00
2. 18:00

The answer on the book said a=5, b=30 and c=7
But I get stuck on b=0, can any one help

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: July 23, 2017
Today on TSR

### Are you living on a tight budget at uni?

From budgets to cutbacks...

### University open days

1. University of Cambridge
Wed, 26 Sep '18
2. Norwich University of the Arts
Fri, 28 Sep '18
3. Edge Hill University
Faculty of Health and Social Care Undergraduate
Sat, 29 Sep '18
Poll

## All the essentials

### Student life: what to expect

What it's really like going to uni

### Essay expert

Learn to write like a pro with our ultimate essay guide.

### Create a study plan

Get your head around what you need to do and when with the study planner tool.

### Resources by subject

Everything from mind maps to class notes.

### Study tips from A* students

Students who got top grades in their A-levels share their secrets