DieSoftJoin Date: 2009-08-03
Post Count: 17635 |
Due to my visit in Newcastle I missed two lessons which was the introduction to trigonometry. Anyone who knows how to solve this?
prntscr/710yjw
Translation:
The triangle ABC is given according the figure. Calculate the length of the side AC.
Preferably step by step how you solve it would be nice.
:o |
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RaethyrJoin Date: 2008-03-08
Post Count: 20527 |
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DieSoftJoin Date: 2009-08-03
Post Count: 17635 |
No and the fact that I have a constant headache due to my eyes being strained constantly does not help me study but I need to get this stuff over with. Got my math test on Friday.
:| |
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AssaltoJoin Date: 2011-12-31
Post Count: 9149 |
man i'm barely passing algebra 2 |
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I'm still calculating triangles with theorems.
Can't help you ;//// |
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LacraseJoin Date: 2015-01-14
Post Count: 12706 |
Google is more reliable then cheeto finger licking 12 year olds |
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KrehJoin Date: 2013-03-11
Post Count: 1505 |
you're god, you can figure this out |
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look up the law of sines
haven't used it in three years tbh |
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GentaurgJoin Date: 2011-03-19
Post Count: 8648 |
sin a divided by line A = sin b divided by line B = sin c divided by line C
you know that angle c is 86 degrees
sin(86)/AB(which is 6.6) = sin(42)/AC
get calculator plz |
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ZealotsJoin Date: 2011-04-28
Post Count: 14002 |
Wait it's that Cos and sin such things? I'm really lazy to go to the link :(
~Grand Master: The king of all kings. (14,022+ posts)[08'er] |
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GentaurgJoin Date: 2011-03-19
Post Count: 8648 |
AB is 6.6 to clarify |
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ywisJoin Date: 2014-08-08
Post Count: 12931 |
C/sin C = B/sin B
First you need to find the top angle, it is 180-92 = 88
Now you substitute it in
6.6 / sin (88) = x / sin(42). [x being AC]
Now re arrange the forumla,
sin(42) times 6.6/sin(88)
That should give you the answer. |
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ywisJoin Date: 2014-08-08
Post Count: 12931 |
Agent, it's the opposite. |
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QiaolianJoin Date: 2014-11-22
Post Count: 13003 |
180 - 52 - 42 = 86 degrees
That's the third angle.
One formula of the triangle is
a/sin A = b/sin B
where a is a side and A is its corresponding angle
and b is a side and B is its corresponding angle
let's say AB is a
and AC is b
because you want to calculate AC
so
a = 6.6
A (the angle corresponding) = 86 degrees
b = ?
B (The angle corresponding) = 42 degrees
plug and play
6.6/sin 86 = b/sin 42
cross multiply
6.6 * sin 42 / sin 86 = b
b = 4.427
I drink bleach all day every day. |
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GentaurgJoin Date: 2011-03-19
Post Count: 8648 |
o ur right its the opposite |
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ywisJoin Date: 2014-08-08
Post Count: 12931 |
Pyrante you"re right about the angles but wrong about the rearranging.
You want the AB or x to be alone. |
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LexatusJoin Date: 2013-09-28
Post Count: 6567 |
You can only do trig with a right-angled trinagle, for a start.
You will need to do pythag in order to do the trig. |
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I...what? I seriously hope I never take trigonometry, PINEAPPLES!
"Cowards die many times before their actual deaths."-Julius Caesar |
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QiaolianJoin Date: 2014-11-22
Post Count: 13003 |
no i'm not.
it's just cross multiplication
i must've gotten one of the angles wrong though.
idk
I drink bleach all day every day. |
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ywisJoin Date: 2014-08-08
Post Count: 12931 |
You are doing equals to, not times by.
Re arranging the forumla makes it easier. |
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