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Determine whether the planes are parallel, perpen…

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Problem 50 Medium Difficulty

Find the cosine of the angle between the planes $ x + y + z = 0 $ and $ x + 2y + 3z = 1 $


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Related Courses

Calculus 3

Calculus: Early Transcendentals

Chapter 12

Vectors and the Geometry of Space

Section 5

Equations of Lines and Planes

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Vectors

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Vectors Intro

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Vector Basics Overview

In mathematics, a vector (from the Latin word "vehere" which means "to carry") is a geometric object that has a magnitude (or length) and direction. A vector can be thought of as an arrow in Euclidean space, drawn from the origin of the space to a point, and denoted by a letter. The magnitude of the vector is the distance from the origin to the point, and the direction is the angle between the direction of the vector and the axis, measured counterclockwise.

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Video Transcript

Hello. So the question is straight and from vectors and geometry of space fine. And we have to find a cousin of the angle between the planes. So there are two planes. The funniest X plus Y plus that is equal to zero and the other is X plus two Y plus trees. It is equal to them. And the direction because I know vector corresponding peddler to this plane is I plus J. Plus key is equal. So this is the vector corresponding to let this is victor a corresponding to first plane. And retro be corresponding to second plane is I plus to the G Plus three. Okay so a sign of feta between these two is vector a vector B divided by model vector A and model that will be okay. So it'll be will be I plus G plus k. Don't I place two J last two. Okay divided by magnitude of I plus J plus case square with one plus one plus one. So that will be squared. Okay. Okay so and the magnitude of vector B is one plus four plus. Nice. So like my father solving it we get the value of course of three to is equal to my daughter is one. Jojo is one. Otherwise I dont jay z I don't gaze you so we get one plus two. Last three Divided by Square with three and Square 14. So that will be six or 1 squared what to do. Okay which is the so which is the required value of the sine of the angle between them. So angle will be caused in world six. So we'll spare 42. So its historic wired solution of the equation. Hope this grazers.

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Calculus: Early Transcendentals

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Related Topics

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Top Calculus 3 Educators
Lily An

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Video Thumbnail

02:56

Vectors Intro

In mathematics, a vector (from the Latin word "vehere" meaning "to carry") is a geometric entity that has magnitude (or length) and direction. Vectors can be added to other vectors according to vector algebra. Vectors play an important role in physics, engineering, and mathematics.

Video Thumbnail

11:08

Vector Basics Overview

In mathematics, a vector (from the Latin word "vehere" which means "to carry") is a geometric object that has a magnitude (or length) and direction. A vector can be thought of as an arrow in Euclidean space, drawn from the origin of the space to a point, and denoted by a letter. The magnitude of the vector is the distance from the origin to the point, and the direction is the angle between the direction of the vector and the axis, measured counterclockwise.

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