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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=(√(5^2 +3^2 −2×5×3×cos 120°))  =(√(25+9+15))  =7

$${x}=\sqrt{\mathrm{5}^{\mathrm{2}} +\mathrm{3}^{\mathrm{2}} −\mathrm{2}×\mathrm{5}×\mathrm{3}×\mathrm{cos}\:\mathrm{120}°} \\ $$$$=\sqrt{\mathrm{25}+\mathrm{9}+\mathrm{15}} \\ $$$$=\mathrm{7} \\ $$

Commented by I want to learn more last updated on 23/Feb/21

Thanks sir. I appreciate.

$$\mathrm{Thanks}\:\mathrm{sir}.\:\mathrm{I}\:\mathrm{appreciate}. \\ $$

Commented by Tawa11 last updated on 14/Sep/21

nice

$$\mathrm{nice} \\ $$

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