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? | ||
| ||
Next event in 6m
[ Submit Event ] |
StarCraft 2 StarCraft: Brood War Shuttle 772 Dota 2Bisu 523 Pusan 307 BeSt 108 EffOrt 93 Dewaltoss 88 Backho 69 Sacsri 25 Terrorterran 25 IntoTheRainbow 21 [ Show more ] League of Legends Counter-Strike Other Games Organizations Other Games StarCraft 2 StarCraft: Brood War StarCraft 2 StarCraft: Brood War
StarCraft 2 • Berry_CruncH178 StarCraft: Brood War• aXEnki • intothetv • Gussbus • Kozan • IndyKCrew • LaughNgamez Trovo • Laughngamez YouTube • Migwel • Poblha League of Legends |
Replay Cast
ByuN vs GuMiho
TBD vs Rogue
TY vs DongRaeGu
TBD vs Bunny
TBD vs SHIN
TBD vs Classic
ESL Pro Tour
RotterdaM206
OSC
ESL Pro Tour
PassionCraft
ESL Pro Tour
World Team League
ESL Pro Tour
Korean StarCraft League
Afreeca Starleague
hero vs Soulkey
[ Show More ] AfreecaTV Pro Series
Reynor vs Cure
ESL Pro Tour
World Team League
ESL Pro Tour
BSL
Zhanhun vs DragOn
Dewalt vs Sziky
CSO Cup
Replay Cast
Sparkling Tuna Cup
ESL Pro Tour
World Team League
ESL Pro Tour
BSL
Gypsy vs Bonyth
Mihu vs XiaoShuai
ESL Open Cup
ESL Open Cup
ESL Open Cup
|
|