Hey mikejohn.

Look at my response in your other thread.

Results 1 to 2 of 2

- October 31st 2012, 10:16 AM #1

- Joined
- Oct 2012
- From
- UK
- Posts
- 4

## Please help

Hello guys

I hope you have a great time.

Please could you show me how to solve the following questions, by steps if possible:

Q1- Find the components of all vectors v which have length 2 and are perpendicular to both the lines

x = 4 + 3t, y = 2 − t, z = 1 + 5t and x − y + z = 2, 3x + 2y − 4z = 6.

Q2- Find the equation of the plane, simplified as much as possible, that contains the point where the

line x = −1 + 2t, y = −4 + 2t, z = 1 − 4t intersects the xz-plane, and is perpendicular to the line

(x+1)/3=(3y+1)/6=(1-2z)/4

Q3- Prove that if A, B, and C are three points in space, then the area of triangle ABC can be

calculated with the formula

Area of triangle ABC = 1/2|AB × AC|.

I would really appreciate your help

Mike

- October 31st 2012, 09:34 PM #2

- Joined
- Sep 2012
- From
- Australia
- Posts
- 5,446
- Thanks
- 1313