CIE A Level Maths: Pure 3复习笔记7.3.3 The Scalar ('Dot') Product

The Scalar ('Dot') Product

The scalar product is an important link between the algebra of vectors and the trigonometry of vectors. We shall see that the scalar product is somewhat comparable to the operation of multiplication on real numbers.

What is the scalar (dot) product?

What is the connection between the scalar product and trigonometry?

7-3-3-the-scalar-product

Worked Example

7-3-3-the-scalar-_dot_-product-we-solution

Exam Tip

  • When writing a scalar product, it’s important to write a distinctive dot between the vectors – otherwise your meaning will not be clear.

 

 

 

 

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