Need help with Maths (GCSE) Watch

LivMalseed
Badges: 2
Rep:
?
#1
Report Thread starter 3 years ago
#1
Right, I have exam coming up soon and I really need to learn the sin and cos wave and how to describe the TERRible (Translation, Enlargement, Reflection and Rotations). My maths teacher have chosen the worse time to be ill and stay home and other math teachers haven't been helpful '"why would a C-grade student be asking for help on A* topics"' '"You don't need to learn that"' '"it's not important, you don't need that, focus on C's topic"'
They don't understand that I want A* in my maths so I do need to learn Sin and Cos wave, can someone help me learn and understand it?
0
reply
JamieGre
Badges: 1
Rep:
?
#2
Report 3 years ago
#2
These videos should be quite helpful:

https://www.youtube.com/watch?v=zYXKxvMmHkE
https://www.youtube.com/watch?v=4iAh2ajUb2M
https://www.youtube.com/watch?v=a8F5bGfG46U
0
reply
lukey0071
Badges: 2
Rep:
?
#3
Report 3 years ago
#3
(Original post by LivMalseed)
Right, I have exam coming up soon and I really need to learn the sin and cos wave and how to describe the TERRible (Translation, Enlargement, Reflection and Rotations). My maths teacher have chosen the worse time to be ill and stay home and other math teachers haven't been helpful '"why would a C-grade student be asking for help on A* topics"' '"You don't need to learn that"' '"it's not important, you don't need that, focus on C's topic"'
They don't understand that I want A* in my maths so I do need to learn Sin and Cos wave, can someone help me learn and understand it?
So..........
Sin wave is very simple

At 180 degree, the number is at 0 because it's on the line but if the point is at 90 degree then it should be at 1.
Go on the calculator and put SIN(90), the answer should be 1
Also, if you put SIN(180) then the answer would be 0.
The reasons why:
For example:
If you put the point on the disc and the pencil in the middle so you can roll on it, two tables , the gap where you should put the disc, roll it, you can see the point, it starts from the 180 to 90 and gone down to 180 to 90 down then up to 180 to 90 up. Go on the Internet, put sin x wave. You will understand my point.



Cos wave

Very complicated so I will try my best to explain in details


If you put in the calculator, cos(180), the answer is -1 and 90= 0
So why?
Because it doesn't start at 180.
It's starts at 0 degree so the answer in the calculator will be 1. ( cos(0)=1)

So it did start in 0 degree moves to 90 which is 0 and then moves to 180 which is -1 etc......270 degree back to 0.

So the graph should start from 0 to 180 from 1 to -1.
Look on the Internet, cos x wave
1
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts

All the exam results help you need

985

people online now

225,530

students helped last year
Latest
My Feed

See more of what you like on
The Student Room

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

Personalise

University open days

  • Sheffield Hallam University
    Clearing open day Undergraduate
    Tue, 20 Aug '19
  • Bournemouth University
    Clearing Open Day Undergraduate
    Wed, 21 Aug '19
  • University of Dundee
    Undergraduate Open Day Undergraduate
    Mon, 26 Aug '19

Are you going to self-release into Clearing?

Yes I've pressed the button (75)
17.28%
No I'm happy with my uni offer (280)
64.52%
Not yet but I am planning to (21)
4.84%
Not yet but I might (58)
13.36%

Watched Threads

View All