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http://static.k12.com/eli/bb/817/-1/0/2_36843_44974/-1/d064582a0cf3fa6c8783e88a968d415900f4a14e/media/6eb300a0cf1356f83a39450126a1321870ef4eca/mediaasset_652569_1.png b/a c/b a/c c/a
the triangle is not complet
well thats the question .....exactly
i hate cos tan and sin ........ worst at it ever
where is you angle degree?
it is very simple
there is none???? @amorfide
sohcahtoa cos so we use ah a is the adjacent side length, h is the hypotenuse so lets draw our triangle |dw:1434628807787:dw|
hypotenuse is opposite the right angle always
the opposite side length is opposite the angle and adjacent is the one left over
btw is the question asking cos b or cosB
if it is asking cosB then cosB=a/h lets label our triangle |dw:1434629018296:dw| cosB=adjacent/hypotenuse you can finish it
@amorfide It must be cos B (and that is the usual way of labelling triangles) @HWBUSTER00 This is about geometry and is using 'general' notation. You do not need actual numbers (e.g. lengths or angles) to answer the question in 'letters' The cosB is the adjacent side divided by hypotenuse each of those sides is denoted by a letter a,b or c so the answer (as seen ) is a fraction made of letters (such as x/y) you do not need numbers to answer 'general' equations
WHICH MEANS THAT THE CAPITAL A,B,C are the angles
while the a,b,c are the sides
it is 'adjacent divided by hypotenuse' but you have written hypotenuse divided by adjacent just try again - you have the correct sides - in the wrong order
ohhh c/a ......that my fault
OK good now can I ask you to stop a moment an ask WHY you hate these trig functions? They are simply divisions (or ratios) of the sides and there are only 3 to remember right now.
they are to complicated ????? I dont know maybee it is because my ocd ???? i hate it when numbers are not there ..........it is so frustrating
|dw:1434629727102:dw| in these triangles the angle is always the same If oyu divide the opposite by the adjacent you ALWAYS get the same
In th above case this answer is the TAN of the angle but the SAME appies to the the ratio between other sides. If oyu have studied similar triangles you can see why th eratio is always the same
ohh thank you so much!!!!!! you are such a great help.
do you know how to do this on http://static.k12.com/eli/bb/817/-1/0/2_36843_44974/-1/d064582a0cf3fa6c8783e88a968d415900f4a14e/media/cf27c592a79e2dbe6cffe23d1941dce276408f01/mediaasset_652591_1.png
The actual number is not important - you can see if you keep the angle th esame, but increae the length of a side then the OTHER sides increase by the same scale factor. THEREFORE the ratio of the sides stays the same provided trh eangle is the same - and those ratios are sine, cosine, and tangent
what is z
I DO know how to do the second one - but it is more important that YOU do If you look at the angle Z (49 deg) then what is the 'name' of the side z (opposite, adjacent or hypotenuse) What is the 'name' of the side labelled 4?
OK - you need to look at the way th etriangles are labelled - once oyu see this then the functions are easier Look at angle Z Look at side z in relation to Angle Z where is side z (opposite, adjacent or hypotenuse) hint - the hypotenuse is ALWAYS the longest side and is ALWAYS opposite the right angle (90 deg)
ok good and now th eside labelled 4? is that opposite, adjacent or hypotenuse
to what ?? z
in relation to Angle Z where is side labelled 4 (opposite, adjacent or hypotenuse)
OK so for angle Z we know Angle Z= 39 deg Opposite side = z Adjacent side = 4 Which of the functions (sin cos and tan) uses Opposite and adjacent?
you must have seen these - there are 3 to remember and there are many ways on the web given to remember them sine = O/H cosine = A/H Tangent = O/A so which one uses Opposite side and Adjacent side?
sorry i had to go outside .....lol
9.75 or 3.2?
I have no idea what those numbers are I you want ot understand these functions please answer the above: sine = O/H cosine = A/H Tangent = O/A so which one uses Opposite side and Adjacent side? THEN for angle Z we know Angle Z= 39 deg Opposite side = z Adjacent side = 4
it is a multiple choice question .
3.2 1 39 9.75
I don't really care about the answer - I can do it in my head I want you to go away not 'hating' trig functions Do not worry about the numeric answer - concentrate on the method I am showing you. Please tell me if you are not interested in any of this....and only want the answer
If you want to understand these functions please answer the below: sine = O/H cosine = A/H Tangent = O/A so which one uses Opposite side and Adjacent side? THEN for angle Z we know Angle Z= 39 deg Opposite side = z Adjacent side = 4
so one side of the triangle always less than the other
OK - I'm out of here - I have tried to show oyu the method but you do not seem to want ot follow it. sine = O/H cosine = A/H Tangent = O/A so which one uses Opposite side and Adjacent side?
z ........but not angle z
my intention was not for you to do my work . it was to help with the question but you decided to give me a whole math lesson for witch I already told you i dont understand. you are being pretty rude and i dont appreciate it. and for some reason you want to take control and i dont know why . it was question .
This a maths forum - I am here to give maths 'help' call it a lesson if oyu want. I have asked oyu to do a few simple steps which would guide you to the answer and I have tried to expand the concept so that see what oyu are doing is not inherently difficult. I asked several times for you to answer THIS (below) because it is the next KEY steo to getting the answer you want, but oyu have answered something else, or answered without giving any thought to what I asked. You have left the forum in th emiddle of help without notice. So I feel it is YOU who is not being polite. IF you can refer back to what has been discussed and explained in the above posts then you can answer the following: sine = O/H cosine = A/H Tangent = O/A so which one uses Opposite side and Adjacent side?