Question

A is 5 units B is 7 units find magnitude of this angle 60 degree in addition

Answer 1

Answer:

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Explanation:

Let 5he vectors be a and b.  

|a - b|² = (a - b). (a - b)  

= |a|² + |b|² - 2a.b (noting that a.b = b.a))  

= 25 + 25 - 2 x 5 x 5 cos60°  

= 50 - 50 x (1/2) = 25.  

So |a - b| = 5.