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Pure 3 help...

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candy:
please look at the attachment

astarmathsandphysics:
sinx =o/h=a/f but since perimater of triangle is half perimeter of rectangle, 2r+rx=1/2*8a=4a so 4a=r(2+x) so r=4a/(2+x)

so sinx=a/r=a/(4a/(2+x))=1/4(2+x)

candy:
Thanks astar!  ;)
r u giving math alevel? :)

candy:
 ??? ??? part 2 please  ??? ???

astarmathsandphysics:
I am private Tutor. Wont be home for hours.

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