Not solved.
 

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

No.







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

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

lmao Daren.

No, this is actually homework.

And I'm terribly stuck.

None of my friends know either.

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.

wtf

we haven't done that in class rofl.

Listen to Mr Trumpet. He excels in Math.

lol Linda.

But like what if it's wrong?

I don't think it's right.

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

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

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

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.

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

My teacher wouldn't care.

I bet he has a sword in the drawer.

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

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

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.

pahaha Stu.

I wish I could get let off that easily.

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.....

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.

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

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

lol

I get it now.

4/3 = 1.33

Tan ^-1(1.33) = 53.1

Thanks anyway.

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

but it is also 233.1

tan^-1(4/3) = 53.13

Noobs.

Oh it was already solved, ****.

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? :(

Twilight?

Yeah I'm stuck again.

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

:(

i hate maths

That stufff scrambles my brain :P

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.

Ohhhh err :rolleyes:.

:nono: