# Maths question .....

Found 27th Apr 2010
9X+5=3X+41

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42 .

x = 6

9x+5 = 3x+41
9x=3x+36
6x=36
x=6

x=6..

Original Poster

i got 6x = 36 and then some one sed they got 6 = x and i thought i was wrong but its the same lol !!!

6.......

aah96;8471294

i got 6x = 36 and then some one sed they got 6 = x and i thought i was … i got 6x = 36 and then some one sed they got 6 = x and i thought i was wrong but its the same lol !!!

s'ok. nice to see a question i can do...

currently stuck on

sin2x = tanx
1-cos2x

emhaslam;8471322

s'ok. nice to see a question i can do...currently stuck onsin2x = … s'ok. nice to see a question i can do...currently stuck onsin2x = tanx1-cos2x

Also 42.........

:-D

xxx X2

= xxxxxx

6x

x6

x = 6 wut? lol

emhaslam;8471289

9x+5 = 3x+419x=3x+366x=36x=6

spot on bud :thumbsup:

sancho1983;8471326

Also 42.........:-D

cheers. i've got no other answer to put down.

* several days later wastes time explaining to teacher why he put down 42... well i posted it on a maths forum and this really clever man told me... *

Original Poster

looooool , i feel clever :-D

59.....

x=6.....

emhaslam;8471322

s'ok. nice to see a question i can do...currently stuck onsin2x = … s'ok. nice to see a question i can do...currently stuck onsin2x = tanx1-cos2x

Using the double angle fourmulae would make that simpler to work out. :thumbsup:

*quickly exits this thread due to being too thick*

9X+5=3X+41
9x-3x=41-5
6x=36
x=6
Teaching Intermediate one maths!

wii expert;8471681

*quickly exits this thread due to being too thick*

+1 :oops:

spic;8471633

Using the double angle fourmulae would make that simpler to work out. … Using the double angle fourmulae would make that simpler to work out. :thumbsup:

i've got it to

1 = tanx
tanx

so

1= tan2x (tan squared x) but not sure then. will leave it there me thinks....

Original Poster

wii expert;8471681

*quickly exits this thread due to being too thick*

4lyons09;8471777

+1 :oops:

im 14 , and i can do this !!!

aah96;8471864

im 14 , and i can do this !!!

I left school years ago. Not something I use everyday!! No doubt the majority are the same.

Original Poster

4lyons09;8472028

I left school years ago. Not something I use everyday!! No doubt the … I left school years ago. Not something I use everyday!! No doubt the majority are the same.

True && things are changing !!

emhaslam;8471322

s'ok. nice to see a question i can do...currently stuck onsin2x = … s'ok. nice to see a question i can do...currently stuck onsin2x = tanx1-cos2x

sin2x - tanx =
2sinxcosx - sinx/cosx =
sinx(2cosx - 1/cosx) =
0

So sinx = 0, which happens when x = 0,180 or
2cosx = 1/cosx
cosx = +/-(1/root2)
x = 45, 135, 225, 315

is the initial equation

sin(2x) = tanx
1-cos(2x)

or is it

sin^2(x) = tanx
1-cos^2(x)
--------------(sin squared x )over (1 minus cos squared x) equals tan(x)

Original Poster

starsparkle2311;8473301

aherm, where is your mum? Asking for answers on the internet indeed!!! … aherm, where is your mum? Asking for answers on the internet indeed!!! You should be locked in the cupboard, working it out for yourself:w00t:Nothing learnt from easy answers babe:)

im not cheating !!!! :w00t:

i knew the answer but some one told me another answer and i was sure mine was right but there both right lol !!

x=6...
@
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