WJEC maths calc

Scroll to see replies

Nothing too hard, circle question was hard, and why was that pythagoras question with the rectangle worth so many marks lol.

Reply 21

Piepi

I feel I got the A* but it also seemed to easy, idk

Reply 22

jamesalsbury

Original post by G98

Also what did you get for the question which I think you had to use the cosine rule for and how did you do it-don't think I did well on this one.

I think I got around 59°, can't remember exactly but you used the area of a triangle first and then you can used the inverse sine rule.

Reply 23

dj3467

I got around 59.8 which I rounded to 60 is that correct ^ ?

Reply 24

jamesalsbury

Original post by dj3467

I got around 59.8 which I rounded to 60 is that correct ^ ?

Yes i guess so if the answer didn't specifically ask for certain decimal places. Even if it did, you'd still get 5/6 for getting the right answer.

Reply 25

dj3467

It didn't btw, most degree question want it to 1 integer

Reply 26

dj3467

For the circle question with trig - I got 37.2cm for perimeter.

Reply 27

jamesalsbury

Original post by dj3467

For the circle question with trig - I got 37.2cm for perimeter.

Yeah I got that too I think, took me a while to realise it was trig though.

Was it just me but 2)d) I didn't really understand the question.
It was like calculate the % of a flight being late

Reply 30

jamesalsbury

Original post by dj3467

Was it just me but 2)d) I didn't really understand the question.
It was like calculate the % of a flight being late

The chance of it being on time was 92% so the chance of it being late was 8%. I think it was as easy as that really.

Reply 31

dj3467

That's over 30000, the said A flight

Reply 32

dj3467

I did 2400/30000 = 0.08%

Reply 33

jamesalsbury

Original post by dj3467

That's over 30000, the said A flight

It would still be 8% though I think

Reply 34

dj3467

Anyway 1 mark who cares

Reply 35

G98

Original post by dj3467

I did 2400/30000 = 0.08%

The calculation you did was correct but 0.08 as a decimal converts into 8%

What answer did you get for the triangle + sine rule question.

(edited 8 years ago)

Reply 36

jamesalsbury

Original post by G98

The calculation you did was correct but 0.08 as a decimal converts into 8%

What answer did you get for the triangle + sine rule question.

I think I got around 59°, can't remember exactly but you used the area of a triangle first and then you can used the inverse sine rule.

Reply 37

G98

Original post by jamesalsbury

I think I got around 59°, can't remember exactly but you used the area of a triangle first and then you can used the inverse sine rule.

I'm pretty sure I got 59 degrees as well, but I seemed to have used a completely different method to everyone else so I don't know if I'll get the marks for it.

Reply 38

jamesalsbury

Original post by G98

I'm pretty sure I got 59 degrees as well, but I seemed to have used a completely different method to everyone else so I don't know if I'll get the marks for it.

There's probably loads of ways to do it so as long as you get the correct answer, they won't/can't mark you down for not doing the same as everybody else.

Reply 39

G98

Original post by jamesalsbury

There's probably loads of ways to do it so as long as you get the correct answer, they won't/can't mark you down for not doing the same as everybody else.