$\mathop A\limits^ \to  \,$ અને  $\mathop B\limits^ \to  $ વચ્ચેનો ખૂણો =$ 110^° – 20^° = 90^°$

$R\,\, = \,\,\sqrt {{A^2}\,\, + \;\,{B^2}\,\, + \;\,2AB\,\cos \,\,90^\circ } \,\, = \,\,\sqrt {{5^2}\,\, + \;\,{{12}^2}} \,\, = \,\,13m$

સદિશ માંથી નો ખૂણો $\alpha$  છે તેમ લો

$\tan \,\,\alpha \,\, = \,\,\frac{{B\,\,\sin \,\,\theta }}{{A\,\, + \;\,B\,\,\cos \,\,\theta }}\,\, = \,\,\frac{{12\,\,\sin \,\,90^\circ }}{{5\,\, + \;\,12\,\,\cos \,\,90^\circ }}$

$ = \,\,\frac{{12\,\, \times \,\,1}}{{5\,\, + \;\,12\,\, \times \,\,0}}\,\, = \,\,\frac{{12}}{5}$

અથવા $\alpha \,\, = \,\,{\rm{ta}}{{\rm{n}}^{{\rm{ – 1}}}}\,\,\left( {\frac{{12}}{5}} \right)\,\,$

સદિશ $\mathop A\limits^ \to  $  $\left( {\alpha + 20^\circ } \right)\,X\,$

અક્ષ સાથે