24-11-2024 - Analytic Geometry - Scalar Products [EN]-[IT]
~~~ La versione in italiano inizia subito dopo la versione in inglese ~~~
ENGLISH
24-11-2024 - Analytic Geometry - Scalar Products [EN]-[IT]
With this post I would like to give a short instruction about the topic mentioned in the subject
(code notes: X_67)
Scalar Products
Scalar products are useful tools to calculate angles and lengths.
Let's consider the standard scalar product on R3.
We will have the following situation
Example
Let's try to calculate the standard scalar product of the following pair of vectors.
In this case we immediately identify how to calculate the scalar product between these two vectors that we will call V and W.
So the two vectors will be:
v = (v1,v2,v3)
w = (w1,w2,w3)
The scalar product is calculated in the following way:
Let's remember what the vectors v and w are like
Let's now proceed with the calculation by substituting the values in the first formula shown in this exercise
Continuing with the calculations we will arrive at this result
The scalar product will be so
In this case we can say that the vectors are orthogonal
Example 2
Now let's find the standard scalar product of the following pairs of vectors. (1 3 0 -1) and (0 2 -1 4)
The scalar product is the following
Conclusions
The scalar product between two vectors in a scalar (a number) is the basis of many other mathematical operations.
Question
Have you ever tried to do the scalar product between two vectors?
[ITALIAN]
24-11-2024 - Geometria analitica - Prodotti scalari [EN]-[IT]
Con questo post vorrei dare una breve istruzione a riguardo dell’argomento citato in oggetto
(code notes: X_67)
Prodotti scalari
I prodotti scalari sono strumenti utili per calcolare gli angoli e le lunghezze.
Consideriamo il prodotto scalare standard su R3.
Avremo la seguente situazione
Esempio
Proviamo a calcolare il prodotto scalare standard della seguente coppia di vettori.
In questo caso identifichiamo subito come calcolare il prodotto scalare tra questi due vettori che chiameremo V e W.
Quindi i due vettori saranno:
v = (v1,v2,v3)
w = (w1,w2,w3)
Il prodotto scalare si calcola nella seguente maniera:
Ricordiamo come sono i vettori v e w
Procediamo ora con il calcolo andando a sostituire i valori nella prima formula mostrata in questo esercizio
Proseguendo con i calcoli arriveremo a questo risultato
Il prodotto scalare sarà quindi
In questo caso possiamo dire che i vettori sono ortogonali
Esempio 2
Troviamo ora il prodotto scalare standard delle seguenti coppie di vettori. (1 3 0 -1) e (0 2 -1 4)
Il prodotto scalare è il seguente
Conclusioni
Il prodotto scalare tra due vettori in uno scalare (un numero) è alla base di molte altre operazioni matematiche.
Domanda
Avete mai provato a fare il prodotto scalare tra due vettori?
THE END
Its an interesting lesson. Mathematical calculations involving scalar products are always intriguing and it's a vast and complex area of maths and physics. Thanks for writing and happy Sunday.
Scalar product is the most difficult topic you have ever thought us
It’s quite hard to
You are building up little interest into me for calculations. Maybe I should start of practicing for fun 🥰
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