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a1234
 one year ago
a = 5 and c = 20. Find A and round to two decimal places.
a1234
 one year ago
a = 5 and c = 20. Find A and round to two decimal places.

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a1234
 one year ago
Best ResponseYou've already chosen the best response.0dw:1444623329598:dw Is A equal to 14.48 degrees?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Are you familiar with the law of sines?

a1234
 one year ago
Best ResponseYou've already chosen the best response.0Yes, but I don't think they're needed here. sinA = 5/20 A = sin^1 * 5/20

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0It makes things a bit easier `LAW OF SINES:` \[\frac{ \sin(A) }{ a }=\frac{ \sin(B) }{ b }\] Plug in what we know \[\frac{ \sin(90) }{ 20 }=\frac{ \sin(A) }{ 5 }\] \[A=\sin^{1} (\frac{ 5\sin(90) }{ 20 })\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Technically, the law applies to the whole triangle so it should be \[\frac{ \sin(A) }{ a }=\frac{ \sin(B) }{ b }=\frac{ \sin(C) }{ c }\] But you get the idea

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Your answer is correct though.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Eh, it doesn't make it simpler. But later on you'll see that it's great to have.

a1234
 one year ago
Best ResponseYou've already chosen the best response.0Yes, it can be useful, but maybe not in this particular case
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