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Mathematics is my favorite subject.:D

Mathematics is my favorite subject.:D

siddarthshetty

Mine too. :D 

[QUOTE="siddarthshetty"]

Mathematics is my favorite subject.:D

ikhzo

Mine too. :D

Interesting! :twisted:

Don't suppose either of you two could explain Simultaneous equations and Linear line graphs to me?

@Naju: Likewise.. I've just spent the whole afternoon sleeping. >.<

If you ask questions like that then even if we don't know we can google it and post it here...I will be honest here I don't remember many things which I studied but those question you asked are simple ones(i feel so.:P) and I think I can solve problems too if you give me.

I will try to give short answers for this.

1. Simultaneous equation are equations with variables.

simple eg: ax+by=c

2. Linear graph is a straight line on X and Y axis which is given as

y=mx+c. where m is the slope which can be found by substituting in equation.

y=(Y2-Y1)

x=(X2-X1)

c=point where it meets the axis.

If you ask questions like that then even if we don't know we can google it and post it here...I will be honest here I don't remember many things which I studied but those question you asked are simple ones(i feel so.:P) and I think I can solve problems too if you give me.

I will try to give short answers for this.

1. Simultaneous equation are equations with variables.

simple eg: ax+by=c

2. Linear graph is a straight line on X and Y axis which is given as

y=mx+c. where m is the slope which can be found by substituting in equation.

y=(Y2-Y1)

x=(X2-X1)

c=point where it meets the axis.

siddarthshetty

? I learned it as y=mx+b

If you ask questions like that then even if we don't know we can google it and post it here...I will be honest here I don't remember many things which I studied but those question you asked are simple ones(i feel so.:P) and I think I can solve problems too if you give me.

I will try to give short answers for this.

1. Simultaneous equation are equations with variables.

simple eg: ax+by=c

2. Linear graph is a straight line on X and Y axis which is given as

y=mx+c. where m is the slope which can be found by substituting in equation.

y=(Y2-Y1)

x=(X2-X1)

c=point where it meets the axis.

siddarthshetty

lol, wow. Well its not any sum in particular.

But simultaneous equations, ok.

2x + Y = 7

3 x - Y = 8

Now.. Heres how I understand it. You must first get rid of one of these letters. Y is of the same value, so I'll use equation 2 to minus Y from + Y in Equation 1.

Next, you add up whats left, so..

5x = 15, thus x must = 3. As 5 goes into 15 three times.

Next we must substictute Y back into the equation. This part is what gets me.. But I'll give it a go.

I'll sub it into the first. So 2x + Y = 7. x = 3, so 2x = 6. So, it is now 6 + Y = 7, so Y must = 1.

X= 3

Y= 1

Equation complete. And that was an easy one. :P

[QUOTE="siddarthshetty"]

If you ask questions like that then even if we don't know we can google it and post it here...I will be honest here I don't remember many things which I studied but those question you asked are simple ones(i feel so.:P) and I think I can solve problems too if you give me.

I will try to give short answers for this.

1. Simultaneous equation are equations with variables.

simple eg: ax+by=c

2. Linear graph is a straight line on X and Y axis which is given as

y=mx+c. where m is the slope which can be found by substituting in equation.

y=(Y2-Y1)

x=(X2-X1)

c=point where it meets the axis.

Kman5507

? I learned it as y=mx+b

Equation complete. And that was an easy one. :P

supergohan1

Very easy actually. :P

[QUOTE="supergohan1"]

Equation complete. And that was an easy one. :P

ikhzo

Very easy actually. :P

But, I do seem to get the idea now. Know a harder one?

[QUOTE="ikhzo"][QUOTE="supergohan1"]

Equation complete. And that was an easy one. :P

supergohan1

Very easy actually. :P

But, I do seem to get the idea now. Know a harder one?

How about 3 equations with 3 unknowns? It's still easy imo. :P 

I will give you one problem..:|

find x if

sin2x+sin4x+sin6x=0.

I will give you one problem..:|

find x if

sin2x+sin4x+sin6x=0.

siddarthshetty

60 degress, or pie/3..correct?

I'll tell ya how I did it if the answer is right. :P 

[QUOTE="siddarthshetty"]

I will give you one problem..:|

find x if

sin2x+sin4x+sin6x=0.

ikhzo

60 degress, or pie/3..correct?

I'll tell ya how I did it if the answer is right. :P

[QUOTE="ikhzo"][QUOTE="siddarthshetty"]

I will give you one problem..:|

find x if

sin2x+sin4x+sin6x=0.

siddarthshetty

60 degress, or pie/3..correct?

I'll tell ya how I did it if the answer is right. :P

That's disgusting. I did not substitue any random values.

Here's how I did. There might be an easier way to solve it though...

[spoiler]

sin2x+sin4x+sin6x = 0

2sin4xcos2x+sin4x = 0 (Using formula of sina+sinb)

On simplifying..

2cos2x = -1

cos2x = -0.5

2x = cosinverse(-0.5)

2x = 120degrees,240degrees

x = 60degrees(pie/3),120degrees(2pie/3) 

[/spoiler]  

I think you forgot few formula buddy..:|

there is no formula like that for sina+sinb.

I think you forgot few formula buddy..:|

there is no formula like that for sina+sinb.

siddarthshetty

uhh..

I just found this at wiki. :|

http://upload.wikimedia.org/wikipedia/en/math/2/7/b/27baa5fb481ec2dcaf6cbb38b56f2570.png 

[QUOTE="siddarthshetty"]

I think you forgot few formula buddy..:|

there is no formula like that for sina+sinb.

ikhzo

uhh..

I just found this at wiki. :|

http://upload.wikimedia.org/wikipedia/en/math/2/7/b/27baa5fb481ec2dcaf6cbb38b56f2570.png

[QUOTE="ikhzo"][QUOTE="siddarthshetty"]

I think you forgot few formula buddy..:|

there is no formula like that for sina+sinb.

siddarthshetty

uhh..

I just found this at wiki. :|

http://upload.wikimedia.org/wikipedia/en/math/2/7/b/27baa5fb481ec2dcaf6cbb38b56f2570.png

Ohh, how did you do?

And that formula is very basic...you might've forgotten! 

Yeah after you gave me that link I remembered that formula...Its been almost 6 years when did all those problems.:P

This is how I did.

[spoiler]

siny + sin2y + sin3y = 0
siny + 2siny.cosy - 4sin(^3)y + 3siny = 0
2siny.cosy - 4sin(^3)y + 4siny = 0
siny.cosy - 2sin(^3)y + 2siny = 0
siny(cosy - 2sin(^2)y + 2) = 0
siny(cosy - 2(1 - cos(^2)y) + 2) = 0
siny(cosy - 2 + 2cos(^2)y + 2) = 0
siny(cosy + 2cos(^2)y) = 0
siny.cosy (1 + 2cosy) = 0
siny = 0 or cosy - 0 or cosy = -1/2

replace back y=2x.

[/spoiler]

I hate those :evil:

Too bad all next year's math classes are triganometry for me :cry:

Are you guys trying to figure out the ending to Mass Effect 3?:Pbugbag

through trigonometry? yes :P 

They have LOTR games? I've never even seen the movies :PKman5507

[QUOTE="Kman5507"]They have LOTR games? I've never even seen the movies :PThe_Last_Ride

[QUOTE="Kman5507"]They have LOTR games? I've never even seen the movies :PThe_Last_Ride

Better than starwars?

[QUOTE="The_Last_Ride"][QUOTE="Kman5507"]They have LOTR games? I've never even seen the movies :PKman5507

Better than starwars?

[QUOTE="Kman5507"]

[QUOTE="The_Last_Ride"] :o you should! Probably one of the best trilogies everbugbag

Better than starwars?

Really?

Maybe I should check this out...

Out of the movies I liked The Two Towers the best. My favorite of the books is the Fellowship of the Ring.

Often though, I consider it as one movie. It's one of the best trilogies and by far, one of the most iconic.

I like the Return of the King more than the other two movies.

As for the books, fellowship of the rings is my favorite in the trilogy.

[QUOTE="The_Last_Ride"][QUOTE="Kman5507"]They have LOTR games? I've never even seen the movies :PKman5507

Better than starwars?

[QUOTE="Kman5507"]

[QUOTE="The_Last_Ride"][QUOTE="Kman5507"]They have LOTR games? I've never even seen the movies :PThe_Last_Ride

Better than starwars?

Thats true. I hate when people compare two things that have no relationships between them :x

[QUOTE="The_Last_Ride"][QUOTE="Kman5507"]

Better than starwars?

Kman5507

Thats true. I hate when people compare two things that have no relationships between them :x

Well I guess you can say which one you personally enjoyed watching more.Kman5507

True, but some things really are just terrible.

[spoiler] [/spoiler]

True, but some things really are just terrible.

[spoiler] [/spoiler]

supergohan1