Question

Encontre o ângulo formado pelos vetores u= (-2, 5, 11) e v= (13, 3√3, 0)

Answer 1

|u|=√(2^2 +5^2 +11^2)=√150
|v|=√(13^2 +(3√3)^2 +0)=14
<u,v>=|u||v|>cos@