Question Number 133371 by I want to learn more last updated on 21/Feb/21
Answered by mr W last updated on 22/Feb/21
Commented by mr W last updated on 21/Feb/21
$${x}=\sqrt{\mathrm{5}^{\mathrm{2}} +\mathrm{3}^{\mathrm{2}} −\mathrm{2}×\mathrm{5}×\mathrm{3}×\mathrm{cos}\:\mathrm{120}°} \\ $$$$=\sqrt{\mathrm{25}+\mathrm{9}+\mathrm{15}} \\ $$$$=\mathrm{7} \\ $$
Commented by I want to learn more last updated on 23/Feb/21
$$\mathrm{Thanks}\:\mathrm{sir}.\:\mathrm{I}\:\mathrm{appreciate}. \\ $$
Commented by Tawa11 last updated on 14/Sep/21
$$\mathrm{nice} \\ $$