Not solved.

[Firewire]

I'm stuck.

Maths homework.

Trigonometric graphs and equations.

And I'm in the top class in my year.

It says..

Solve these equations, correct to 1 decimal place, for 0 ≤ x ≤ 360.

3 tan x° = 4

Can someone help me?

EDIT: SOLVED

[Axiom]

No.







Only joking, don't have a clue sorry mate!

[xDramatick]

Considerin all the XF threads flying about I thought this was going to be about those Danyl && Lloyd rumours...

[Firewire]

lmao Daren.

No, this is actually homework.

And I'm terribly stuck.

None of my friends know either.

[Crimson Dynamo]

First, tan x = 3/4 ==> sin x = 3/5 by using sohcahtoa and the 3-4-5 right triangle.

Next, sin(pi - x) = sin pi cos x - cos pi sin x = sin x.
Since tangent has period pi, tan(pi+x) = tan(4pi+x) = tan x.

Next,
cos(3pi/2+x) = cos(3pi/2) cos x - sin(3pi/2) sin x = sin x
cos(5pi/2-x) = cos(5pi/2) cos x + sin(5pi/2) sin x = sin x

So,
(sin(pi - x) + tan(pi+x) + tan(4pi+x)) /(cos(3pi/2+x)+cos(5pi/2-x))
= (sin x + tan x + tan x) / (sin x + sin x)
= (sin x + 2 tan x)/ (2 sin x).
= (3/5 + 2 * 3/4)/ (2 * 3/5)
= 7/4.

[Firewire]

wtf

we haven't done that in class rofl.

[lily.]

Listen to Mr Trumpet. He excels in Math.

[Firewire]

lol Linda.

But like what if it's wrong?

[Firewire]

I don't think it's right.

[MrGaryy]

just say you can't do it, I did that all the time even when i could which was like all the time *hurrflip*

[lily.]

LoL.. you should actually, seriously, do it yourself Jon... cuz ye never know what kinda shite yer guna get told on here.

[xDramatick]

Just say you couldn't do it, if you copy what LT put above, they'll probably ask you to explain it.

[Firewire]

I can't say I couldn't do it.

I don't have that type of teacher.

I would be DEAD if I don't have it done.

You forget a pencil. You get your head bitten off.

[Ross]

Say you couldn't do it you broke a nail.

[Firewire]

My teacher wouldn't care.

I bet he has a sword in the drawer.

[ILoveTRW]

x=tan^(-1)(4/3)

so the principle value is 53.1
but x can also be 233.1 in the 0<x<360 range

[Ross]

Give him head then. "Sir, I couldn't do it I'm sorry but I can make it up to you... please."

[Stu]

Tell him you have taken up a keen interest in philosophy, and simply can't commit to a piece of homework that you don't know for sure exists.

Worked for me for about eight years. I think.

[Firewire]

pahaha Stu.

I wish I could get let off that easily.

[lily.]

What part don't you understand ?

[Ross]

What part don't you understand ?

He's a first time giver. He'll be fine after a few attempts. Trust.
Show him the ways Linda... you gently put it in your mou.....

[Firewire]

I don't understand the whole question.

We haven't done this in class.

[Stu]

I don't understand the whole question.

We haven't done this in class.
Then just tell that to him. Don't **** it, you can't be expected to do something you haven't even covered, man.

[ILoveTRW]

I don't understand the whole question.

We haven't done this in class.

have you seen my post, that is the answer :thumbs:

[lily.]

He's a first time giver. He'll be fine after a few attempts. Trust.
Show him the ways Linda... you gently put it in your mou.....

haha... Ross!!!!!! Too Far!!!!! He's another one who is under 16!!!!!

[Firewire]

lol

I get it now.

4/3 = 1.33

Tan ^-1(1.33) = 53.1

Thanks anyway.

[Ross]

haha... Ross!!!!!! Too Far!!!!! He's another one who is under 16!!!!!

Oh my god I always get the young ones. :( fgs.

[ILoveTRW]

lol

I get it now.

4/3 = 1.33

Tan ^-1(1.33) = 53.1

Thanks anyway.

but it is also 233.1

[Rory]

tan^-1(4/3) = 53.13

Noobs.

[Rory]

Oh it was already solved, ****.

[lily.]

Oh my god I always get the young ones. :( fgs.


haha.. we're guna have to make a list in here, of people we can't make crude jokes about! LoL

[Ross]

haha.. we're guna have to make a list in here, of people we can't make crude jokes about! LoL

so far;

sweet_samy
Jonathan.

anyone else? :(

[Firewire]

Twilight?

[Firewire]

Yeah I'm stuck again.

If sin x° = 0.3 and cos x° = -0.7, 0 ≤ x ≤ 360, calculate the value of tan x°.

:(

[Stephanie]

i hate maths

[CiaraD]

That stufff scrambles my brain :P

[ILoveTRW]

I would give you the answer but seen as you totally ignored me with the last question, no chance

[Firewire]

I would give you the answer but seen as you totally ignored me with the last question, no chance

I didn't.

I used your answer to get the right answer.

I just had to re-arranged it to make sense to me.

[Stu]

I would give you the answer but seen as you totally ignored me with the last question, no chance
Ohhhh err :rolleyes:.

[ILoveTRW]

:nono:

[Lauren]

Yeah I'm stuck again.

If sin x° = 0.3 and cos x° = -0.7, 0 ≤ x ≤ 360, calculate the value of tan x°.

:(

Is that not just 0.3/-0.7 because sin/cos? I'm terrible at math though.

[Firewire]

Is that not just 0.3/-0.7 because sin/cos? I'm terrible at math though.

I'm not sure.

I'll copy someone tomorrow.

[Lauren]

Jonathan you should concentrate more in class :nono: haha

[Scarlett.]

I'm stuck.

Maths homework.

Trigonometric graphs and equations.

And I'm in the top class in my year.

It says..

Solve these equations, correct to 1 decimal place, for 0 ≤ x ≤ 360.

3 tan x° = 4

Can someone help me?

EDIT: SOLVED

jesus....they do teach kids a load of **** dont they?

[Ross]

Lauren don't become a teacher you're scary lol!

[Lauren]

Lauren don't become a teacher you're scary lol!


lmao I know, my constantly judging eyes! I'd be a horrible teacher. (Not to mention the fact I can't do maths).

[Firewire]

Jonathan you should concentrate more in class :nono: haha

Actually Miss Fahey.

The teacher didn't teach us it. :L