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Maths & Physics Help

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astarmathsandphysics:
Am not at home now.

ny:
i do have a silly question here.
could anyone please explain to me for this question:

-OCT/NOV 2008 mathematics paper 2( both variants) question 5.it has smthng that i don't really undrstand.i know its about locus but how? my teacher didnt teach us this type of question.thank you.

yinyang:
place the sharp end of the compass on point B and the pencil on D
then draw a circle with 90 degrees

the arc drawn is the path taken by point D when it is rotated by 90 degrees about point B

emi:
can any one help me with this physics Question.
M/J 2008 Q4.
(a)- i & ii

thanks

sweetsh:
which paper emi?

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