x Turn on thread page Beta
 You are Here: Home

# P3 Revision topic - 1:15pm 9th June - OCR/Edexcel watch

Announcements
1. (Original post by Bhaal85)
∫ ² ³ ± ÷ ° √ ∂ ∞ ≈ ≠ ≡ ≥ ≤ ø Ø ½ ¼ « » µ π

Little tip. If you want to know the values of sin30, sin 45, sin60, cos30, etc. Just type them into your calulator:

e.g.

Sin45 = 0.707106781...... square this number to get 1/2, then just square root 1/2 leaving 1/√2 which is 0.707106781..... but in an EXACT form!

Ok another example:

Sin60=0.866025403........square this number to get 3/4 then square root:

√3/√4 = √3/2 which again is 0.866025403.....

√3/√2 = Sin60
Saves all the hassle of learning them triangles.
i knew that (bt unfortunatly those triangle arent in edexcel or maybe bt i just havent noticed)
2. (Original post by Bhaal85)
∫ ² ³ ± ÷ ° √ ∂ ∞ ≈ ≠ ≡ ≥ ≤ ø Ø ½ ¼ « » µ π

Little tip. If you want to know the values of sin30, sin 45, sin60, cos30, etc. Just type them into your calulator:

e.g.

Sin45 = 0.707106781...... square this number to get 1/2, then just square root 1/2 leaving 1/√2 which is 0.707106781..... but in an EXACT form!

Ok another example:

Sin60=0.866025403........square this number to get 3/4 then square root:

√3/√4 = √3/2 which again is 0.866025403.....

√3/√2 = Sin60
Saves all the hassle of learning them triangles.
lol, isn't weird how different people do things different ways. i learnt the triangles so i didn't have to do it on my calc, cos i always seem to go wrong somehow

lou xxx
3. (Original post by lou p lou)
lol, isn't weird how different people do things different ways. i learnt the triangles so i didn't have to do it on my calc, cos i always seem to go wrong somehow

lou xxx
I learnt the triangles too, but prefer the calculator method.
4. im leaving for the exam! syaaa every1 n good luck!

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: June 9, 2004
Today on TSR

### Loughborough better than Cambridge

Loughborough at number one

### Can I date a girl with no boobs?

Poll

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE