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brinlin
Username
brinlin
Score
68
Membership
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Questions
16
Answers
2
16 Questions
2 Answers
0
285
0
+68
Help pls
Let P (1, 2, 3), Q (2, 3, 1), and R (3, 1, 2).
(a) Derive the parametric equations for the line that passes through P and Q without resorting
to the known formula.
(b) Derive the equation of the plane that passes through the points P, Q, and R
read more ..
brinlin
Aug 13, 2021
0
259
0
+68
Help pls
Find a vector that is perpendicular to the plane passing through the points P (1, 2, 3), Q (2, 3, 1), and R (3, 1, 2).
brinlin
Aug 13, 2021
0
361
1
+68
help pls
Find the angle between the vectors and .
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brinlin
Aug 13, 2021
0
265
0
+68
Help pls
Question:
brinlin
Aug 10, 2021
0
267
0
+68
help pls
The centroid of the faces of a tetrahedron are (17, 0, 3), (-2, 13, 3), (1, 2, 15) and (1, -1, 2). What are its vertices?
brinlin
Aug 10, 2021
0
276
0
+68
help pls
Show that for any point P and any triangle ABC, the sum of the squares of the sides of the triangle is no greater than 3 times the sum of the squares of the distance from P to each of the vertices of triangle ABC. At what point do we have equality?
read more ..
brinlin
Aug 10, 2021
0
318
0
+68
Help
Convert the rectangular coordinates to polar coordinates and spherical coordinates.
brinlin
Jul 24, 2021
0
322
0
+68
Help please
Question:
brinlin
Jul 23, 2021
0
381
1
+68
Help please
Question:
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brinlin
Jul 23, 2021
0
321
1
+68
Help please
Let be a sixth root of unity. Find all possible values of .
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brinlin
Jul 18, 2021
0
270
0
+68
Help asap please
(a) Let a be a cube root of unity, and let b be a fifth root of unity. Prove that ab is a root of unity.
(b) Let a be a primitive cube root of unity, and b be a primitive fifth root of unity. Prove that ab is a primitive root of unity.
read more ..
brinlin
Jul 18, 2021
0
313
0
+68
Help please
Reproduce the angle difference identities for sine and cosine by expressing in rectangular form.
brinlin
Jul 17, 2021
0
362
2
+68
Having some trouble with this
Show that if w is a primitive root of unity for n = 2m, then is a primitive root of unity.
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brinlin
Jul 17, 2021
0
364
2
+68
Need some help with this
Let w be a sixth root of unity. Find all possible values of .
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brinlin
Jul 17, 2021
0
401
2
+68
Help Please
Reproduce the angle difference identities for sine and cosine by expressing in rectangular form.
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brinlin
Jul 16, 2021
0
375
2
+68
Help Please
Prove that
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brinlin
Jul 16, 2021
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latest
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#2
+68
0
How did you get your answer? I don't understand.
brinlin
Jul 17, 2021
#2
+68
0
Sorry, haven't learned this formula.
brinlin
Jul 17, 2021