Question

Two forces magnitnde 8N 15N act point resultant forces 17N the angles

Answer 1

90
$r {}^{2} = a {}^{2} + b { }^{2} - 2ab \cos \alpha$

Answer 2

F resultant =sq.root of [F1^2+F2^2+2F1F2cosx]
F1=8N. F2=15N. F resultant=17N.