What is the distance between $(1 ,( pi)/4 )$ and $(4 , ( pi )/2 )$ ?

Question

2881 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-04-01T00:34:36

$sqrt(17-4sqrt2)approx 3.368$

After using cosine theorem,

$sqrt(1^2+4^2-2*1*4*cos(pi/2-pi/4))$

= $sqrt(17-4sqrt2)$

$approx 3.368$

What is the distance between (1 ,( pi)/4 )(1 ,( pi)/4 ) and (4 , ( pi )/2 )(4 , ( pi )/2 )?