Help with a trigonometric problem...please and thank you
- Thread starter tcc1
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What is it that you are supposed to do?
Plot? Find intercepts? what???
Please read the post titled "Read before Posting".
We can help - we only help after you have shown your work - or ask a specific question (not a statment like "Don't know any of these")
Please share your work with us indicating exactly where you are stuck - so that we may know where to begin to help you.
help with all the entire problem
y= -2sin pi x
y=Asin Bx
A=absolute value of -2= 2
period= 2pi/B 2pi/pi=2
x1=0
x2=0+2/4=1/2
x3=1/2+1/2=1
x4=1+1/2=1 1/2
x5=1 1/2+1/2=2
table
x y= -2sin pi x (x,y)
0 y= -2sin (pi times 0) (0,0)
1/2 y= -2sin ? (?,?)
1 y= -2sin ? (?,?)
1 1/2 y= -2sin ? (?,?)
2 y= -2sin ? (?,?)
That's all that I've been able to solve so far, then I got to plot it on the chart, that part I can do it, but I 'm having trouble on solving the table, so if you can help me I really appreciate it, thanks and God bless.
y= -2sin pi x
y=Asin Bx
A=absolute value of -2= 2
period= 2pi/B 2pi/pi=2
x1=0
x2=0+2/4=1/2
x3=1/2+1/2=1
x4=1+1/2=1 1/2
x5=1 1/2+1/2=2
table
x y= -2sin pi x (x,y)
0 y= -2sin (pi times 0) (0,0)
1/2 y= -2sin ? (?,?)
1 y= -2sin ? (?,?)
1 1/2 y= -2sin ? (?,?)
2 y= -2sin ? (?,?)
That's all that I've been able to solve so far, then I got to plot it on the chart, that part I can do it, but I 'm having trouble on solving the table, so if you can help me I really appreciate it, thanks and God bless.
mmm4444bot
Super Moderator
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- Oct 6, 2005
- Messages
- 10,962
I don't understand your issue.
You correctly substituted x = 0 in the first one, to get -2sin(pi*0)
What's preventing you on the next one from substituting x = 1/2, to get -2sin(pi*1/2)
RE:: Help with a trigonometric problem...please and thank you
That's the thing I'm not sure on how to continue, cause I'm confused, :-(
That's the thing I'm not sure on how to continue, cause I'm confused, :-(
I don't understand your issue.
You correctly substituted x = 0 in the first one, to get -2sin(pi*0)
What's preventing you on the next one from substituting x = 1/2, to get -2sin(pi*1/2)
mmm4444bot
Super Moderator
- Joined
- Oct 6, 2005
- Messages
- 10,962
Well, then you typed wrongly.
Do not type question marks to represent things that you already know.
SHOW your work. I have no idea what you try until after you tell me.
Did you simplify pi*1/2? The result is a standard angle in radians (it's 90 degrees, in fact).
You need to memorize the sines and cosines of all the standard angles in Quadrant I -- including right angles and zero angles.
Have you seen radian measure before? Is that where you're stuck?
Do you have a textbook?
Standard angles:
pi/2 radians = 90 degrees
pi/3 radians = 60 degrees
pi/4 radians = 45 degrees
pi/6 radians = 30 degrees
0 radians = 0 degrees
Do not type question marks to represent things that you already know.
SHOW your work. I have no idea what you try until after you tell me.
Did you simplify pi*1/2? The result is a standard angle in radians (it's 90 degrees, in fact).
You need to memorize the sines and cosines of all the standard angles in Quadrant I -- including right angles and zero angles.
Have you seen radian measure before? Is that where you're stuck?
Do you have a textbook?
Standard angles:
pi/2 radians = 90 degrees
pi/3 radians = 60 degrees
pi/4 radians = 45 degrees
pi/6 radians = 30 degrees
0 radians = 0 degrees