Recent content by sarah786

i have solved some questions but my answers don't match with the solution list i have in my book... please if you help me check my answers, i'll be very grateful.. √3 tan x - sec x - 1 = 0 ... i get three solutions to this question but my book's got two... it doesn't mention 5pi/3 + 2n*pi...

can you please correct me with some other questions?? i have solved them but my answers don't match the book's... √3 tan x - sec x - 1 = 0 ... i get three solutions to this question but my book's got two... it doesn't mention 5pi/3 + 2n*pi... do u think this is also a soln to this question...

@ tiny-tim.. thank you! :)

solve the trigonometric equations tan 2(theta) + cot(theta) = 0 When i solved this question, i got pi/2 + 2n*pi and 3*pi/2 + 2n*pi ... but my book says the answer should be pi/6 + n*pi and 5pi/6 + n*pi Is my answer wrong?? if so, then what's your solution.?

Can you please explain how to factorize x4+2x2+9 If i do it by quadratic formula, i get complex roots ... in my book, it has been factorized to (x2+2x+3)(x2-2x + 3)

Yes.. i did this same mistake :smile:

and yea... it means square root of 3

oopsss... sorryy... yeahh thanks for telling ... the question is: [-(1/2) + iota*(sq.root3)/2]^3

no... i think i have very clearly stated my question...

i have to "simplify" it and write the "simplified form" as a complex number...

no, i have to remove that power "3" somehow... i have to write a complex number to the power 1...

I have practiced solving de moivre's theorem... but i don't know why i keep getting the wrong answer in a particular question although i have checked a hundred times and havn't found a mistake... this is the question i am talking about: Simplify the following ( separate into real and imaginary...

I can't find a proof for the multiplicative inverse of complex numbers... can anybody please tell me the proof (i already know what the formula is)

thanks for the effort but honestly, i didn't understand your answer... I was asking that it seems more like reflection...in diffraction, the light ray passes through the slit and bends.. but by looking at the diagram I perceived that the x-ray was just bouncing back...

:shy: By looking at the figures showing diffration of x-rays by crystals, it looks more like reflection.. Seems like I am studying reflection... So, where is the diffraction part??