AHHHHHH! I'm falling so far behind in this class now. As soon as we learned the Law of Cosines and I saw how much work it is I quit feeling like doing homework and I didn't feel like doing that whole quiz. I'm too lazy for this class. At least I know how to do the Law of Cosines I guess.
Law of Cosines:
(opposite side)^2=(adjacent leg)^2 + (other adjacent leg)^2 -2(adj leg)(other adj leg)cos(angle between the legs)
So all you really do is plug in the numbers from the triangle and then solve for whatever you need to solve for haha. When you plug in the numbers you just square root the whole thing then solve however you're suppose to be solving it.
OK. I need help with the Law of Sines. I have a feeling I was sleeping in class or something when we learned this because I do not remember a single thing about it and I can't understand my notes either.
Laws of Sines: sin A/a = sin B/b = sin C/c
ReplyDelete*used when pairs are known in non-right angles
*set up a proportion
Example: A = 47°, a = 8, B = 92°
Find b.
sin 47/8 = sin 92/b (cross multiple)
b sin 47 = 8 sin 92 (then divide)
b = 8 sin 92/sin 47(finally plug in ur calc.)
b = 10.932
i hope that helped terrio...