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:
![[image loading]](http://i25.tinypic.com/m7scz.jpg)





Blogs > Raithed |
Raithed
China7078 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
China7078 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
China7078 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
China7078 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
China7078 Posts
Thanks hellhawk, so that would be theta1? | ||
hellhawk123
United States84 Posts
| ||
Raithed
China7078 Posts
| ||
hellhawk123
United States84 Posts
| ||
Kwidowmaker
Canada978 Posts
| ||
Raithed
China7078 Posts
| ||
Kwidowmaker
Canada978 Posts
I'm of the understanding that L1 is only the black and not the yellow line. | ||
Raithed
China7078 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 Dota 2 League of Legends Counter-Strike Super Smash Bros Heroes of the Storm Other Games Organizations
StarCraft 2 • Berry_CruncH92 StarCraft: Brood War• practicex ![]() • IndyKCrew ![]() • AfreecaTV YouTube • intothetv ![]() • Kozan • sooper7s • LaughNgamezSOOP • Migwel ![]() Dota 2 Other Games |
SOOP
Zoun vs Solar
Sparkling Tuna Cup
WardiTV Spring Champion…
herO vs Classic
Clem vs TBD
Zoun vs MaxPax
AllThingsProtoss
OSC
uThermal 2v2 Circuit
BSL Season 20
izu vs Sterling
Tech vs Napoleon
SOOP
PiG Sty Festival
Serral vs MaNa
ByuN vs Classic
Afreeca Starleague
ZerO vs BeSt
[ Show More ] Wardi Open
Monday Night Weeklies
PiG Sty Festival
Clem vs SKillous
Rogue vs Zoun
Afreeca Starleague
Jaedong vs Light
PiGosaur Monday
PiG Sty Festival
herO vs Creator
Cure vs ShoWTimE
The PondCast
PiG Sty Festival
Reynor vs Bunny
Dark vs Astrea
PiG Sty Festival
Korean StarCraft League
PiG Sty Festival
Hatchery Cup
PassionCraft
Circuito Brasileiro de…
|
|