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|dw:1332811985103:dw| do you know the Law of Cosines?
there are actually 3 but they're all basically the same... since you want Angle A, i'll write it out for you in it's most common form: a^2 = b^2 + c^2 -2abcosA
using this formula, solve for cosA... what do you have?
34 is cos a
forget about the lengths given for now... solve for cosA in terms of a, b, c.
ok so if I have a 34 b 28 and c 15 would i have to times them all by their number again
this gives you cosA. Do you know how to find A from here?
ya so if I add bsquared and c swuared I would get 666
b^2 + c^2 = 666 ?
ok I have no idea how to do it can you just do it really quick so I can learn from you how to do it please that would help a lot
hang on, there's a problem here...
|dw:1332812914165:dw| ok, that should be it.
hold on im trying to figure it out
ok, that's better. can you calculate the right side?
I cant see the end of what u typed
the end numbers I cant see what they say
i still cant see the end numbers lol not sure why
ok so its 2 28 and i cant see the last one
|dw:1332813456241:dw| these are just the given values for a, b, and c
dude i cant see the end numbers can u just tell me the answer i dont kno why the end is not poping up
|dw:1332813552368:dw| your job now is to find A knowing the cosine of A
can you at least do this?
ok, 100 degrees.