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    (Original post by AshenSun)
    I don't suppose you have any notes on Trig Identities for the FSMQ that I could read?
    Yup. If you don't understand them you probably need more practise with them - that was the case for me.

    The only ones you really need to know are:

    sin^2\theta+cos^2\theta=1

    \frac{sin}{cos}=tan

    rearrange as necessary

    I'll post my notes now anyway

    edit: internet being stupid, can't upload them sorry

    But I can explain anything if you need
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    Who's mad/bad
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    Do any of you know how I can wake up with energy? And like feel the need to revise, instead of like dying after 2 minutes? :-(


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    (Original post by Bude8)
    Yup. If you don't understand them you probably need more practise with them - that was the case for me.

    The only ones you really need to know are:

    sin^2\theta+cos^2\theta=1

    \frac{sin}{cos}=tan

    rearrange as necessary

    I'll post my notes now anyway

    edit: internet being stupid, can't upload them sorry

    But I can explain anything if you need
    Thank you.
    The bit I don't understand is when you solve theta to get a number, then you have to do certain things depending on if you're looking for the values of sin/cos/tan. How do you know what to do? eg. Add 180
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    (Original post by AshenSun)
    Thank you.
    The bit I don't understand is when you solve theta to get a number, then you have to do certain things depending on if you're looking for the values of sin/cos/tan. How do you know what to do? eg. Add 180
    It is to do with a graph. Sin is positive in the first region (where you leave the angle as the found acute one) and the second (180-acute gives answer). Tan is positive in the first and third (180+acute angle) and cos in first and final (360-acute). Look up the trig graph as it will probably help to make sense of what I just said.

    If the angle required is negative, then you go to the regions where it is negative, eg region 3 and 4 for sin.

    Hope this helps you. I have a slightly inappropriate method of remembering the order I can PM you if you want
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    Biology was good

    Off for 12 twelve days now, but still got my toughest exam to sit.
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    (Original post by AshenSun)
    Thank you.
    The bit I don't understand is when you solve theta to get a number, then you have to do certain things depending on if you're looking for the values of sin/cos/tan. How do you know what to do? eg. Add 180
    ok, so we get a question like:


    we use the identity sin/cos=tan
    sin theta/cos theta = 3/4
    tan theta = 3/4

    you type tan^-1(3/4) onto your calculator for the principal value. Sketch a graph and using the graph's symmetry you can work out the other values within the region.

    Do you know what the graphs look like?
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    I didn't want to risk doing PE outdoors in this morning's weather (PE Monday afternoon was ****ing ridiculous I'm not doing that again) so I was like "hey parents I'm not going to school" and they were all like "cool"
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    Can I talk to someone? :/


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    (Original post by Jina)
    Can I talk to someone? :/


    Posted from TSR Mobile

    KIK
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    Got some more results

    Spoiler:
    Show

    Statistics - 31/40 (marked wrong imo)

    Biology - 48/48
    Chemistry - 48/48
    Physics - 48/48
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    OFSTED are visiting my school tmorow s all my revision sessions are cancelled
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    (Original post by Bluffroom)
    OFSTED are visiting my school tmorow s all my revision sessions are cancelled
    That's just stupid! The school cares more about sucking up to OFSTED than your grades. How much I detest this system is beyond words!

    (Original post by L'Evil Fish)
    Got some more results

    Spoiler:
    Show

    Statistics - 31/40 (marked wrong imo)

    Biology - 48/48
    Chemistry - 48/48
    Physics - 48/48
    Well done! why do you think statistics was marked wrong? Aside from the obvious fact that you could never get such a low grade if you tried!
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    (Original post by Vionar)
    That's just stupid! The school cares more about sucking up to OFSTED than your grades. How much I detest this system is beyond words!



    Well done! why do you think statistics was marked wrong? Aside from the obvious fact that you could never get such a low grade if you tried!
    Because she entered marks before reading them... Eg she predicted some ****ing marks
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    Just downloaded the maths IGCSE papers I did last year out of interested.
    Wondering how on Earth I actually dropped marks in them
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    (Original post by L'Evil Fish)
    Because she entered marks before reading them... Eg she predicted some ****ing marks
    Now that's just plain idiotic. If you really want to, you could report her to someone!
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    (Original post by NoMathsPlease)
    Just downloaded the maths IGCSE papers I did last year out of interested.
    Wondering how on Earth I actually dropped marks in them
    hmm I might download my GCSE maths paper and mark scheme see where i dropped marks :L
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    (Original post by L'Evil Fish)
    Got some more results

    Spoiler:
    Show

    Statistics - 31/40 (marked wrong imo)

    Biology - 48/48
    Chemistry - 48/48
    Physics - 48/48
    How do you get full marks on biology? :confused:
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    (Original post by Vionar)
    Now that's just plain idiotic. If you really want to, you could report her to someone!
    Can't be asked... As long as it's not moderated down
    (Original post by Elm Tree)
    How do you get full marks on biology? :confused:
    :dontknow:
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    (Original post by L'Evil Fish)
    Can't be asked... As long as it's not moderated down
    Could be moderated up!
 
 
 
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