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Question Number 76108 Answers: 1 Comments: 1
Question Number 76098 Answers: 2 Comments: 0
Question Number 76122 Answers: 4 Comments: 0
Question Number 76090 Answers: 1 Comments: 1
Question Number 76088 Answers: 0 Comments: 2
Question Number 76087 Answers: 1 Comments: 0
Question Number 76086 Answers: 0 Comments: 0
$${what}\:{is}\:{minimal}\:{expression}\:{for}\:\mathrm{sin}\:\frac{\pi}{{k}}\: \\ $$$$\mathrm{cos}\:\frac{\pi}{{k}},\:\mathrm{tan}\:\frac{\pi}{{k}},\:\mathrm{cosec}\:\frac{\pi}{{k}},\mathrm{sec}\:\frac{\pi}{{k}}{and}\:\mathrm{cot}\:\frac{\pi}{{k}} \\ $$
Question Number 76075 Answers: 1 Comments: 0
$$\mathrm{how}\:\mathrm{i}\:\mathrm{evaluate}\:\mathrm{sin}\left(\pi/\mathrm{7}\right)×\mathrm{sin}\left(\mathrm{2}\pi/\mathrm{7}\right)×\mathrm{sin}\left(\mathrm{3}\pi/\mathrm{7}\right)\: \\ $$$$\mathrm{please}\:\mathrm{help}\:\mathrm{me} \\ $$
Question Number 76061 Answers: 1 Comments: 0
$$\mathrm{What}'\mathrm{s}\:\mathrm{the}\:\mathrm{minimum}\:\mathrm{value}\:\mathrm{of} \\ $$$$\frac{\mathrm{13}{a}+\mathrm{13}{b}+\mathrm{2}{c}}{\mathrm{2}{a}+\mathrm{2}{b}}+\frac{\mathrm{24}{a}−{b}+\mathrm{13}{c}}{\mathrm{2}{b}+\mathrm{2}{c}}+\frac{−{a}+\mathrm{24}{b}+\mathrm{13}{c}}{\mathrm{2}{a}+\mathrm{2}{c}}? \\ $$$$\left({a},{b},{c}\:\mathrm{are}\:\mathrm{positive}\:\mathrm{numbers}.\right) \\ $$$$\mathrm{I}\:\mathrm{think}\:\mathrm{nobody}\:\mathrm{can}\:\mathrm{solve}\:\mathrm{this}. \\ $$
Question Number 76053 Answers: 1 Comments: 2
$${how}\:{I}\:{calculate}\:\int\frac{\mathrm{1}}{{x}^{\mathrm{8}} +{x}^{\mathrm{2}} }{dx}\:? \\ $$
Question Number 76052 Answers: 0 Comments: 1
Question Number 76048 Answers: 2 Comments: 0
$$\int{e}^{{x}^{\mathrm{2}} } {dx} \\ $$
Question Number 76038 Answers: 1 Comments: 0
Question Number 76037 Answers: 1 Comments: 0
$${Prove}\:{That} \\ $$$$\mathrm{sin}\:\mathrm{3}°\mathrm{sin}\:\mathrm{39}°\mathrm{sin}\:\mathrm{75}°=\mathrm{sin}\:\mathrm{9}°\mathrm{sin}\:\mathrm{24}°\mathrm{sin}\:\mathrm{30}° \\ $$
Question Number 76034 Answers: 1 Comments: 0
$$\: \\ $$$$\:\mathrm{53}^{\boldsymbol{\mathrm{log}}_{\boldsymbol{\mathrm{x}}} \left(\mathrm{7}\right)} \:=\:\sqrt{\boldsymbol{\mathrm{x}}} \\ $$$$\: \\ $$$$\:\boldsymbol{\mathrm{x}}\:=\:? \\ $$$$\: \\ $$
Question Number 76032 Answers: 0 Comments: 0
Question Number 76015 Answers: 0 Comments: 0
Question Number 76014 Answers: 0 Comments: 0
Question Number 76013 Answers: 1 Comments: 0
Question Number 76012 Answers: 1 Comments: 0
$$\mathrm{show}\:\mathrm{that}\: \\ $$$$\mathrm{1}−\mathrm{3sin}^{\mathrm{2}} {x}\mathrm{cos}^{\mathrm{2}} {x}=\frac{\mathrm{5}}{\mathrm{8}}+\frac{\mathrm{3}}{\mathrm{8}}\boldsymbol{\mathrm{cos}}\mathrm{4}\boldsymbol{{x}} \\ $$
Question Number 76009 Answers: 1 Comments: 0
$${hiw}\:{do}\:{i}\:{solve} \\ $$$$\mathrm{2}^{{x}} \:=\:\mathrm{4}{x}? \\ $$
Question Number 76003 Answers: 1 Comments: 0
$$\mathrm{22}+\mathrm{2} \\ $$
Question Number 75991 Answers: 1 Comments: 1
Question Number 75990 Answers: 0 Comments: 0
Question Number 75989 Answers: 0 Comments: 0
Question Number 75988 Answers: 0 Comments: 3
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