Vector Magnitude and Direction Concepts

The video tutorial explains how to determine the magnitude and direction of vectors given in component form. It covers two examples: the first involves sketching the vector and using the Pythagorean theorem, while the second uses formulas for quick calculations. The tutorial emphasizes the importance of understanding vector direction in different quadrants and provides step-by-step instructions for using a calculator to find angles.

What is the initial point of the vector in the first example?

• (4, 3)

• (0, 0)

• (3, 4)

• (1, 1)

Which theorem is used to determine the magnitude of the vector in the first example?

• Pythagorean theorem

• Sine rule

• Cosine rule

• Law of tangents

What is the magnitude of the vector in the first example?

• 4

• 6

• 3

• 5

How is the direction angle of the vector in the first example calculated?

• Using secant function

• Using tangent function

• Using cosine function

• Using sine function

What is the approximate direction angle of the vector in the first example?

• 45.0°

• 30.0°

• 60.0°

• 53.1°

What is the terminal point of the vector in the second example?

• (3, -6)

• (-6, 3)

• (6, -3)

• (-3, 6)

Which formula is used to find the magnitude of the vector in the second example?

• x^2 + y^2

• x^2 - y^2

• x^2 * y^2

• x^2 / y^2

What is the simplified magnitude of the vector in the second example?

• √45

• 3√5

• 5√3

• 9

In which quadrant is the direction angle of the vector in the second example?

• Second

• First

• Third

• Fourth

What is the approximate direction angle of the vector in the second example?

• 180°

• 153.4°

• 90°

• 26.6°