/sci/ - Science & Math

self bump

no one on /sci/ tonight huh ^^

>>1186837

Its a matter of scales. Using those two angles, find the rest of the angels. We know the one right next to the 56 is 124 and therfore the very top one, combined is 22.

Figure the rest out

This is like grade 9 shit, seriously

Yeah that's what I tried, I found all angles but I can't use law of sines with the first triangle cuz it doesn't have a 90 degree angle. I dunno man.

Well...

Tan(34) = x/(20+y)

Tan(56) = x/y

Maybe you can solve for x and y now?

I'm too lazy and it's been too long.

easy: make an imaginary triangle straight up from where it says 56, then you can calculate that angle is 34 degrees as well, use that to find the small hypotenuse, etc.

>>1186855
alright, since it's shit could you help me plz

>>1186858

SCALE!!! Find the middle line length through law of Cosines

A/sina =B/sinb = C/sinc

>>1186858
>does not know sine law

>>1186862
yeah that's what I tried at first
>>1186861
thx I'll try that
.>>1186866
Yeah but don't we need at least 2 measures + angle or the 3 measures for the law of cosines?

>>1186876
I know it.

find the rate of change between angles and distances and just derive.
Simple.

OP, find the middle line length
Second triangle has a 90 angle
If you can't figure it from there, drop math

It could be a ratio... you could make some simple trianges.... do whatever. Just draw it, lazy ass.

1. Use 180 - 56 to find obtuse angle in that midpoint area.
2. Use 180 - obtuse - 34 to get top angle in large triangle.
3. APPLY SINE LAW HERE to get hypotenuse of the right triangle.
4. Solve for ? using sin(56) = opp/hyp.

Protip: Radians are superior to degrees.

Damn guys! Thank you very much for your help.

>>1186899
wrong, dipshit, he doesn't know the fucking base

>>1186905
You're welcome.

Grade 10 mathz. I was tutoring this shit. Easy stuff.

shit, I messed up the angles, the 56 one is 64 I think and 34 is just something else. anyways, I can't remember.

>>1186913
What base? That thing beside the 20m? You don't need it.

Protip: once you know ANY THREE angle or side of a triangle, you can get the other three parts from simple trigonometric laws.

THIS IS UNPOSSIBLE

Lol I definetly fucked up the angles, the first triangle isn't rectangle only the second one... Roflmao it'd be easy shit if it were with these angles

>>1186934
How do you use cosine law if you don't have sides c and a?

forget my thread.. I epic failed.

Call the hypotenuse 'h'

<span class="math">\frac{20}{sin(180-34-(180-56))=\frac{20}{sin(22)}=\frac{h}{sin(180-56)}=\frac{h}{sin(124)}[/spoiler]
solve for h.

<span class="math">sin(34)h=x[/spoiler]

>>1186957
well shit on my chest and call me Patty, I thought he had a second side length

Call the hypotenuse 'h'

<span class="math">\frac{20}{sin(180-34-(180-56))}=\frac{20}{sin(22)}=\frac{h}{sin(180-56)}=\frac{h}{sin(124)}[/spoiler]
solve for h.

<span class="math">sin(34)h=x[/spoiler]

well you can find all the angles if you look at the intersection of the middle line with the bottom of the big triangle, with the 56 degree bit

there might be a more elegant solution but I would write up equations for as much stuff as possible, replacing ? with a pronumeral, and then solve simeltanious equations

>>1186837
QUEBECFAG DETECTED

I are you fucking retarded? just use fucking basic trigonometry

>>1186855
and yet, you can't solve it either

This thread is full of idiots.

>>1186837
QUEBECFAG DETECTED

>>1187329

this is correct

fuck

>>1187437
fuck?

>>1187338

I'm sec 4 myself too, this guy's a fucking idiot

>>1187455
and yet, you can't explain it either
even with the answer already posted

Retard lrn2math

>>1187485
I was referring to op

>>1187511

>he thinks he's not a retard himself _ laughing girl.jpg

1) Find the angle opposite the 20 m
= 180 - [34 + (180-56)] = 180 - [34 + 124] = 180 - 168 = 22

2) Use Law of Sines to find the length of side opposite 34 degree angle
a/sin(a) = b/sin(b) = c/sin(c)

20/sin(22) = b/sin(34)
20*sin(34)/sin(22) = b = 29.855

3) Now that I have the length of the hypotenuse of the right triangle I apply the Sines Law again

29.855/sin(90) = c/sin(56)
29.855*sin(56)/sin(90) = c = (29.855 * .829)/1 = 24.751