Trigonometry
Started by A Silent Soliloquy, Jun 16 2008 08:47 PM
10 replies to this topic
#1
A Silent Soliloquy
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Posted 16 June 2008 - 08:47 PM
#2
Shin
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Posted 16 June 2008 - 10:50 PM
QUOTE (A Silent Soliloquy @ Jun 17 2008, 12:47 AM) <{POST_SNAPBACK}>
Anyone halfway decent in it msg me ASAP please!
I think you're more likely to get help if you just post the problem here.
#4
ShadowLink64
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Posted 17 June 2008 - 10:52 AM
QUOTE (SupermanFTM @ Jun 17 2008, 02:05 AM) <{POST_SNAPBACK}>
The problem was sin(x)cos(x)=sqrt(3)/4 
.... unit circle.
sin(x) is equal to (1/2) when cos(x) is equal to sqrt(3)/2. This occurs at pi/6, pi/3, and is (-1/2) and (-sqrt(3)/2) at 4pi/3 and 7pi/6. If you need answers in a larger domain, just add 2pi to these.
The answer (domain: 0<=x<=2pi) is:
x = pi/6, pi/3, 4pi/3, 7pi/6
#5
Sweeney
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Posted 17 June 2008 - 12:18 PM
QUOTE (ShadowLink64 @ Jun 17 2008, 07:52 PM) <{POST_SNAPBACK}>
.... unit circle.
sin(x) is equal to (1/2) when cos(x) is equal to sqrt(3)/2. This occurs at pi/6, pi/3, and is (-1/2) and (-sqrt(3)/2) at 4pi/3 and 7pi/6. If you need answers in a larger domain, just add 2pi to these.
The answer (domain: 0<=x<=2pi) is:
x = pi/6, pi/3, 4pi/3, 7pi/6
sin(x) is equal to (1/2) when cos(x) is equal to sqrt(3)/2. This occurs at pi/6, pi/3, and is (-1/2) and (-sqrt(3)/2) at 4pi/3 and 7pi/6. If you need answers in a larger domain, just add 2pi to these.
The answer (domain: 0<=x<=2pi) is:
x = pi/6, pi/3, 4pi/3, 7pi/6
And divide by pi, and multiply by 180, if you need answers in degrees instead of radians.
#6
Cyo
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Pauly D
Posted 17 June 2008 - 01:08 PM
isent it multiplietied by 360 2 get degrees
#7
Hawk
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hawk·ish·ly
Posted 17 June 2008 - 01:11 PM
QUOTE (Cyo @ Jun 17 2008, 04:08 PM) <{POST_SNAPBACK}>
isent it multiplietied by 360 2 get degrees
Sure, if you divide by 2 pi.
#8
factorxwing
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Posted 17 June 2008 - 01:13 PM
QUOTE (Cyo @ Jun 17 2008, 02:08 PM) <{POST_SNAPBACK}>
isent it multiplietied by 360 2 get degrees
Nope 180/pi is the conversion Radians to Degrees
Degrees to Radians pi/180
#9
Hawk
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hawk·ish·ly
Posted 17 June 2008 - 01:14 PM
QUOTE (factorxwing @ Jun 17 2008, 03:13 PM) <{POST_SNAPBACK}>
Nope 180/pi is the conversion Radians to Degrees
Degrees to Radians pi/180
Degrees to Radians pi/180
Try and explain it all you want, Cyo will never understand.
#10
factorxwing
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Posted 17 June 2008 - 01:16 PM
QUOTE (factorxwing @ Jun 17 2008, 02:13 PM) <{POST_SNAPBACK}>
Nope 180/pi is the conversion Radians to Degrees
Degrees to Radians pi/180
Degrees to Radians pi/180
This problem can also be approached with the Arccos(x) or Arcsin(x).
Arccos(Sqrt(3)/2)=Sin (x), If you are using a calculator and don't remember your unit circle on an exam
#11
Cyo
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Pauly D
Posted 17 June 2008 - 01:17 PM
ah yeah sry
kinda got it mixed up with a circl having 360 degrees and all
kinda got it mixed up with a circl having 360 degrees and all
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