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theres this one question in fitzpatrick i was trying to do today... AB and AC are equal chords of a circle. AD and BE are parallel chords through A and B respectively. Prove that AE is parallel to CD. I know that i have to prove angle EAD and angle ADC are equal, but i cant make use of the...

that last message was for rama thanks i get it

sorry i dont understand your second step

quick question: how to find the primitive of cos^2(3x) do you have to first expand cos3x and then square? this is the approach ive taken but it seems a bit lengthy. please help thanks

couldnt you just use the reciprocal ie 1/sin20?

cool, i get it, thanks for the help

huhhhhh? sorry, i dont get you!

we recently started MI and im having trouble with this question: prove by MI: d/dx (x^n) = nx^(n-1) thanks in advance

i didnt think electrons were orbiting at equal distances from the nuclues - however, thats a good question, what i cant work out is why with hydrogen, its one proton and one orbiting electron dont just fuse, since they are oppositely charged?

you mean 3x^2 - 14x -24 = 0

thanks guys, that all makes sense now

i know that its commonly stated that alkali metals are "stronger" than the alkali earths (group 2), but if both contain strong bases, that ionise completley, how can one be "stronger" than the other??????

ive just googled magnesium hydroxide and all the chemistry websites have claimed it to be a strong base. The Chem Coach is saying that its not a strong base im still confused

thats what ive done, but i just want to know, is the centroid of the triangle also the centre of the circle inscribed within that triangle

do the perpendicular bisectors of the sides of a triangle necessarily concurrent, or is it the bisectors of the angles that are concurrent?

a queation that a friend asked me with which i had no idea: find the equations of the four circles that are tangent to the line x+y-2=0, the x-axis and the y-axis. thanks

thanks, that clears that up

earlier in the year we used bromine solution to illustrate the difference in reactivites between alkanes and alkenes. i was just wandering, how can bromine go into solution, if it is a non-polar molecule, i.e. even electron distribution between the two covalently held bromine atoms? at most the...

theyre off the teachers work sheet, so i dont know if im doing them right. thanks for ur time any way, guys

thanks heaps i didnt think of using implicit diff. i think i made progress by doing it this way: y=x^x lny=xlnx so, e^(xlnx)=y so, dy/dx=(1+x)e^(xlnx). then its pretty much the same deal with the others i think this method is valid, but i'll have to check to see if we arrive at the same...