Qualification > Math
IGCSE MATHS Doubts
Shazizzzle:
According to our teacher, order of rotational symmetry can never be 1.
It's either 0, 2 or 4.
And that image only turned back to it's position after one whole turn,
and...
EVERY IMAGE TURNS BACK TO ITSELF AFTER THE COMPLETE 360 deg,
So, the order or rotational symmetry was 0?
And the sinx-cosx=0.5, what do you suppose can be the range of the answers?
Also, what equation of line did you get in the intersecting lines one, the lat part?
dsiddiqi11:
--- Quote from: Shazizzzle on May 13, 2010, 10:17:20 am ---According to our teacher, order of rotational symmetry can never be 1.
It's either 0, 2 or 4.
And that image only turned back to it's position after one whole turn,
and...
EVERY IMAGE TURNS BACK TO ITSELF AFTER THE COMPLETE 360 deg,
So, the order or rotational symmetry was 0?
And the sinx-cosx=0.5, what do you suppose can be the range of the answers?
Also, what equation of line did you get in the intersecting lines one, the lat part?
--- End quote ---
i got y=3x-13, but is this the question u are talking abt
Shazizzzle:
--- Quote from: dsiddiqi11 on May 13, 2010, 10:19:38 am ---i got y=3x-13, but is this the question u are talking abt
--- End quote ---
Umm, I'm referring to variant 2.
One thing, was the gradient of the line parallel to it 3, or -3?
haris94:
--- Quote from: Dibss on May 13, 2010, 09:51:27 am ---ANSWERS THAT I CAN REMEMBER:
rotational symmetry-1
lines of symmetry -1
rearranging thing x=3/(p-1)
white paint thing = 88
maximum speed of boris - 16.25
sin cos things- 45 degrees and 66 degrees
the very last graph qs - 82 i think and 108
the inequalites R- was in the slightly large area towards the middle/right
P.S. who agrees that the paper was definitely more difficult than past papers but still went super-awesome ;D ;D
I LOOOOVED IT
--- End quote ---
i got exactly the same answers ;D
agreed, paper required more thinking but i think i (like Ari said) killed it 8)
mohit1234:
--- Quote from: dsiddiqi11 on May 13, 2010, 10:19:38 am ---i got y=3x-13, but is this the question u are talking abt
--- End quote ---
i got y=-3x+14
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