Math help for daughter..Please :)
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Elder User
Joined: Oct 2001
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From: virginia beach
Math help for daughter..Please :)
Hello, I havent done this stuff in years and my daughter needs help with it, I will post the questions on here, maybe you could help me. They are multiple choice, but I cant sit here forever 
Thanks...
1. In olblique triangle ABC, a=45, b=60, and B=100 Degrees. Find A to the nearest degree.
2. In oblique triangle ABC, b=19, c=25, and A=65 Degrees. Find a to the nearest tenth.
3. Find the area of the triangle ABC if b=30 meters, c=24 meters, and A=50 degrees. Round the area to the nearest square meter.
4. Plot (-3, 3Pi/4) in the polar coordinate system.
5. Fidn another representation of (-3, 3Pi/4) in which r is positive and 0<_ 0 < 2Pi.
6.Find the polar coordinates of the point with rectangular coordinates (-2, -2 Squareroute3)
7. Plot the complex number z = 2 - 2i.
8. Write the complex number, z = 2 - 2i, in polar forum, expressing the argument in radians.
**In problems 9-10, R=(-2,2) and P2=(4, -6) and v is the vector from p1 and p2**
9.Write in terms of i and j.
10. Find ||V||.
**In prolbmes 11-12, v =2i + 5j and w =i-8j**
11.Find 3v-2w.
12. Find v * w
Thanks again!
Thanks...1. In olblique triangle ABC, a=45, b=60, and B=100 Degrees. Find A to the nearest degree.
2. In oblique triangle ABC, b=19, c=25, and A=65 Degrees. Find a to the nearest tenth.
3. Find the area of the triangle ABC if b=30 meters, c=24 meters, and A=50 degrees. Round the area to the nearest square meter.
4. Plot (-3, 3Pi/4) in the polar coordinate system.
5. Fidn another representation of (-3, 3Pi/4) in which r is positive and 0<_ 0 < 2Pi.
6.Find the polar coordinates of the point with rectangular coordinates (-2, -2 Squareroute3)
7. Plot the complex number z = 2 - 2i.
8. Write the complex number, z = 2 - 2i, in polar forum, expressing the argument in radians.
**In problems 9-10, R=(-2,2) and P2=(4, -6) and v is the vector from p1 and p2**
9.Write in terms of i and j.
10. Find ||V||.
**In prolbmes 11-12, v =2i + 5j and w =i-8j**
11.Find 3v-2w.
12. Find v * w
Thanks again!
Posting Guru
Joined: Sep 2003
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From: Auburn/ Opelika
1-2 is side-side-angle or SSA. for 1. Write 45/sin a =60/sin 100. Cross multiply and solve for 'a'. Optional check step: a/sin A=b/sin B=c/sin C. Divide each side by its angle and all should equal roughly the same number.
3. Area= 1/2 bc sin A. Area= 1/2 times (19)(25) sin 65.
4-8 I just learned in class so I'm still working on it.
9. Example: <3,4>= 3i + 4j
10. [[v]]= squareroot of 'a' squared plus 'b' squared
11. (Classic Distributive Property) 3<2,5> - 2<1, -8>
12. <2,5> * <1,-8> = 2 * 1 + 5 * -8.
That should get ya started, Good luck! Math is tough. -William
3. Area= 1/2 bc sin A. Area= 1/2 times (19)(25) sin 65.
4-8 I just learned in class so I'm still working on it.
9. Example: <3,4>= 3i + 4j
10. [[v]]= squareroot of 'a' squared plus 'b' squared
11. (Classic Distributive Property) 3<2,5> - 2<1, -8>
12. <2,5> * <1,-8> = 2 * 1 + 5 * -8.
That should get ya started, Good luck! Math is tough. -William
Senior User
Joined: Apr 2003
Posts: 197
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From: Phoenix
Hi CRJ -
Are you sure you've typed the questions correctly? For example, in # 1, the total of the angles is 205 degrees - no triangle can exceed 180 degrees. Also, the question asks for A. A is one of the sides of the triangle, not an angle, yet it asks for A in terms of degrees. Also, if the question really is asking for the length of side A, it is impossible to determine with the information given. If you are given the measurements of the three angles in a triangle, it is impossible to find the length of any side unless at least one side's length is defined - who is to say if a set of degrees refers to a HUGE triangle or just a smaller version with the same degree measurements? Similar contradictions occur in the other questions. I taught high school calc for three years - I'm happy to help answer these but I don't think these are the correct wordings of the questions.
let me know....
-aaron
Are you sure you've typed the questions correctly? For example, in # 1, the total of the angles is 205 degrees - no triangle can exceed 180 degrees. Also, the question asks for A. A is one of the sides of the triangle, not an angle, yet it asks for A in terms of degrees. Also, if the question really is asking for the length of side A, it is impossible to determine with the information given. If you are given the measurements of the three angles in a triangle, it is impossible to find the length of any side unless at least one side's length is defined - who is to say if a set of degrees refers to a HUGE triangle or just a smaller version with the same degree measurements? Similar contradictions occur in the other questions. I taught high school calc for three years - I'm happy to help answer these but I don't think these are the correct wordings of the questions.
let me know....
-aaron
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Elder User
Joined: Oct 2001
Posts: 671
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From: virginia beach
Ok, I dont think I typed it right guys. I just scanned it to help you all. Again, thank you all SO much for helping me so far. Hopefully this will work fine...
Here is the front
/38.jpg)
And the back
/39.jpg)
Here is the front
And the back
Last edited by CRJ900; Apr 24, 2004 at 07:53 PM.
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Cargo Master
Joined: Sep 2003
Posts: 2,543
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From: Georgia
Would this be considered as cheating? 
OH man I need to go back to school. None of that stuff looked familiar to me. Perhaps I had to much gonja in those days.
OH man I need to go back to school. None of that stuff looked familiar to me. Perhaps I had to much gonja in those days.
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Thread Starter
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Elder User
Joined: Oct 2001
Posts: 671
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From: virginia beach
Haha I dont think so, I got some help from a friend maybe people who know this could double check it for me.
1. B
2. A
3. C
4. A
5. D
6. B
7. A
8. B
9. C
10. A
11. B
12. D
Thanks all.
1. B
2. A
3. C
4. A
5. D
6. B
7. A
8. B
9. C
10. A
11. B
12. D
Thanks all.
Senior User
Joined: Oct 2003
Posts: 239
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From: Heart of Dixie
I think that the SIN, COSIN, and TAN come in to play in this kind of math. Ive got no clue, im still in algebra, but im pretty sure we went over this stuff last year in algebra I for like a day. Hope that helps - it probably doesnt anyways but at least i can say i tried. good luck!
Drew
Drew
Postmaster
Joined: May 2003
Posts: 2,603
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From: Claremore
Cannot find my calc. at the moment, but if this is due monday, I will be happy to provide some "checking" tomorrow.
Stan
P.S. Just tell her to remember... SOH CAH TOA (Sin=Opp/Adj Cos=Adj/Hyp Tan=Opp/Adj). If you can remember this, than it will make all this stuff a piece of cake. You might want to invest in a Texas Instrument TI-83Plus, it's kindof expensive, but worth every penny I paid for it (about $90), I relied on it all through high school, and still rely on it through college algebra, physics... etc... the works. TRUST ME, IF YOU ARE GOING TO DO TRIG OR PHYSICS, OR CALC, YOU NEED ONE OF THESE. I can provide you with a link if you need. I think you can get one off Ebay for around 60 maybe. What grade is this? Being that it is the last of the semester and this is intro trig, I would be led to assume the actual class is Alg. 2 or something of the like?
Stan
Stan
P.S. Just tell her to remember... SOH CAH TOA (Sin=Opp/Adj Cos=Adj/Hyp Tan=Opp/Adj). If you can remember this, than it will make all this stuff a piece of cake. You might want to invest in a Texas Instrument TI-83Plus, it's kindof expensive, but worth every penny I paid for it (about $90), I relied on it all through high school, and still rely on it through college algebra, physics... etc... the works. TRUST ME, IF YOU ARE GOING TO DO TRIG OR PHYSICS, OR CALC, YOU NEED ONE OF THESE. I can provide you with a link if you need. I think you can get one off Ebay for around 60 maybe. What grade is this? Being that it is the last of the semester and this is intro trig, I would be led to assume the actual class is Alg. 2 or something of the like?
Stan
Posting Guru
Joined: Sep 2003
Posts: 1,276
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From: Auburn/ Opelika
4. (-3, 3Pi/4) = (x,y) or 'A'. (-3, 135 degrees) Point is in quadrant 2. Standard point plotting just with different style terms.
I am confused by 10, there is a problem exactly like it in my notes and it uses P1 for the formula I gave. llvll= squareroot of -2 squared + 2 squared =squareroot of 8, which is not 'A'. But if I use p2 I get answer B. Dunno could be wrong. what grade is she in? -BBB
I am confused by 10, there is a problem exactly like it in my notes and it uses P1 for the formula I gave. llvll= squareroot of -2 squared + 2 squared =squareroot of 8, which is not 'A'. But if I use p2 I get answer B. Dunno could be wrong. what grade is she in? -BBB
