x = 6.0
y = 12.0
L1 = 12"
L2 = 10"
R = sqrtof(10^2+12^2) = 15.62
theta = tan^-1(y/x) = tan^-1(12/6) = 63.43º
How do I find theta1, and theta2?
Sorry for the yellow:
Blogs > Raithed |
Raithed
China7077 Posts
x = 6.0 y = 12.0 L1 = 12" L2 = 10" R = sqrtof(10^2+12^2) = 15.62 theta = tan^-1(y/x) = tan^-1(12/6) = 63.43º How do I find theta1, and theta2? Sorry for the yellow: | ||
hellhawk123
United States84 Posts
| ||
Raithed
China7077 Posts
| ||
Lemonwalrus
United States5465 Posts
Edit: oh, nvmd, I think. Edit2: oh, nvmd the nvmd. | ||
fight_or_flight
United States3988 Posts
On January 31 2008 11:31 Raithed wrote: No, R = sqrtof(10^2+12^2) = 15.62. Not x, y, but a, b. I don't remember those laws. :[ how is R equal to that? you can only use pythagorean theorem for a right-triangle. I'm kind of confused on the question, you should word it better. edit: lol at the theta | ||
Raithed
China7077 Posts
| ||
hellhawk123
United States84 Posts
also law of cosines is given triangle w/ lengths a b c and respective angles alpha beta gamma, c^2=a^2+b^2-2abcos(gamma) (pythag theorem is when gamma=pi/2) | ||
fight_or_flight
United States3988 Posts
On January 31 2008 11:36 hellhawk123 wrote: sorry but how are you getting R? I assumed x=x component of R and y=y component of R? also law of cosines is given triangle w/ lengths a b c and respective angles alpha beta gamma, c^2=a^2+b^2-2abcos(gamma) Correct. If R is given by the (x,y) components, then it should be easy to plug in a, b, c and solve for gamma. | ||
Raithed
China7077 Posts
So basically it is: 13.42^2 = 10^2 + 12^2 - 2(10)(12)cos(gamma) 180 = 100+144 - 240cos(gamma) 180 = 244 - 240cos(gamma) Oh fuck I fail at Algebra, I know the gamma has to be alone, so move the (244 - 240cos) to the other side? | ||
hellhawk123
United States84 Posts
| ||
Raithed
China7077 Posts
Thanks hellhawk, so that would be theta1? | ||
hellhawk123
United States84 Posts
| ||
Raithed
China7077 Posts
| ||
hellhawk123
United States84 Posts
| ||
Kwidowmaker
Canada978 Posts
| ||
Raithed
China7077 Posts
| ||
Kwidowmaker
Canada978 Posts
I'm of the understanding that L1 is only the black and not the yellow line. | ||
Raithed
China7077 Posts
| ||
BluzMan
Russian Federation4235 Posts
| ||
Slayer91
Ireland23335 Posts
theta1 is theta minus the angel opposite l2. Finding those angles is a matter of plugging in the cosine rule, right? | ||
| ||
StarCraft 2 StarCraft: Brood War Britney 16276 Dota 2Calm 4751 Sea 2069 Mini 770 Jaedong 448 ggaemo 298 firebathero 195 Snow 91 Hyun 53 Terrorterran 44 [ Show more ] League of Legends Counter-Strike Super Smash Bros Other Games hiko2123 Grubby1901 Liquid`RaSZi1532 B2W.Neo432 Hui .420 Lowko373 ArmadaUGS364 ceh9280 Mew2King248 Liquid`VortiX240 gofns177 NuckleDu94 KnowMe80 Organizations Counter-Strike StarCraft 2 StarCraft: Brood War StarCraft 2 StarCraft: Brood War |
StarsWar
Maru vs Stats
Cure vs Classic
Solar vs GuMiho
ByuN vs herO
BSL
TerrOr vs XuanXuan
Dark vs JDConan
Korean StarCraft League
StarsWar
WardiTV Invitational
CSO Cup
ForJumy Cup
BSL
Zhanhun vs WolFix
Dienmax vs Cross
Sparkling Tuna Cup
StarsWar
[ Show More ] WardiTV Invitational
ESL Open Cup
Afreeca Starleague
StarsWar
ESL Open Cup
ESL Open Cup
Afreeca Starleague
StarsWar
Club NV x Duckling Show…
GSL Code S
Stats vs SHIN
Cure vs GuMiho
|
|