Hey there! Sign in to join this conversationNew here? Join for free
x Turn on thread page Beta

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

Announcements
    Offline

    2
    ReputationRep:
    (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)
    Offline

    2
    ReputationRep:
    (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
    • Thread Starter
    Offline

    1
    ReputationRep:
    (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.
    Offline

    2
    ReputationRep:
    im leaving for the exam! syaaa every1 n good luck!
 
 
 
Poll
Do you agree with the proposed ban on plastic straws and cotton buds?

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

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.