Question Number 76037 by Crabby89p13 last updated on 22/Dec/19 $${Prove}\:{That} \\ $$$$\mathrm{sin}\:\mathrm{3}°\mathrm{sin}\:\mathrm{39}°\mathrm{sin}\:\mathrm{75}°=\mathrm{sin}\:\mathrm{9}°\mathrm{sin}\:\mathrm{24}°\mathrm{sin}\:\mathrm{30}° \\ $$ Answered by MJS last updated on 23/Dec/19 $$\mathrm{sin}\:\mathrm{3}\:=\mathrm{sin}\:\left(\mathrm{75}−\mathrm{2}×\mathrm{36}\right)\:= \\ $$$$=\mathrm{2cos}^{\mathrm{2}} \:\mathrm{36}\:\mathrm{sin}\:\mathrm{75}\:−\mathrm{2sin}\:\mathrm{36}\:\mathrm{cos}\:\mathrm{36}\:\mathrm{cos}\:\mathrm{75}\:−\mathrm{sin}\:\mathrm{75}\:=…
Question Number 76012 by mathocean1 last updated on 22/Dec/19 $$\mathrm{show}\:\mathrm{that}\: \\ $$$$\mathrm{1}−\mathrm{3sin}^{\mathrm{2}} {x}\mathrm{cos}^{\mathrm{2}} {x}=\frac{\mathrm{5}}{\mathrm{8}}+\frac{\mathrm{3}}{\mathrm{8}}\boldsymbol{\mathrm{cos}}\mathrm{4}\boldsymbol{{x}} \\ $$ Answered by benjo last updated on 22/Dec/19 $$\mathrm{1}−\mathrm{3}/\mathrm{4}\left({sin}^{\mathrm{2}} \mathrm{2}{x}\right)=…
Question Number 10475 by ketto last updated on 13/Feb/17 $${aman}\:{walks}\:\mathrm{600}{m}\:{at}\:{a}\:{bearing}\:{of}\: \\ $$$$\mathrm{45}^{\mathrm{0}\:} {then}\:\mathrm{500}{m}\:{at}\:{a}\:{bearing}\:\mathrm{90}^{\mathrm{0}} \: \\ $$$${then}\:\mathrm{300}{m}\:{at}\:{bearing}\:{of}\:\mathrm{135}^{\mathrm{0}\:} \: \\ $$$${then}\:\mathrm{400}{m}\:{at}\:{a}\:{bearing}\:{of}\:\mathrm{225}^{\mathrm{0}} \\ $$$$.{find}\:{the}\:{resultant}\:{displacement} \\ $$$${which}\:{the}\:{man}\:{has}\:{made} \\ $$…
Question Number 10472 by Wilton last updated on 13/Feb/17 $${My}\:{name}\:{is}\:{Wilton}\:{Stewart}\:{i}\:{have}\:{problem}\:{with}\:{math}\:{i}\:{would}\:{like}\:{some}\:{help}. \\ $$$$ \\ $$ Commented by okhema last updated on 13/Feb/17 $${just}\:{tell}\:{us}\:{the}\:{topics}\:{you}\:{got}\:{problem}\:{with}\:{and}\:{we}\:{will}\:{try}\:{our}\:{best}\:{on}\:{helping} \\ $$$$ \\…
Question Number 10451 by ketto last updated on 09/Feb/17 Answered by amir last updated on 10/Feb/17 $$\Sigma{f}_{{x}} =\mathrm{10}{cos}\mathrm{45}−\mathrm{10}{cos}\mathrm{45}+\mathrm{0}=\mathrm{0} \\ $$$$\Sigma{f}_{{y}} =\mathrm{2}×\mathrm{10}{sin}\mathrm{45}−\mathrm{9}=\mathrm{10}\sqrt{\mathrm{2}}−\mathrm{9}#\mathrm{5}.\mathrm{41} \\ $$$${R}=\sqrt{\left(\Sigma{f}_{{x}} \right)^{\mathrm{2}} +\left(\Sigma{f}_{{y}}…
Question Number 75954 by mhmd last updated on 21/Dec/19 $${prove}\:{that}\:\left({ann}\left({I}\right),+,.\right)\:{identical}\:{in}\:\left({R},+,.\right)? \\ $$ Commented by kaivan.ahmadi last updated on 21/Dec/19 $${its}\:{a}\:{right}\:{ideal}\:{no}\:{identical} \\ $$ Commented by kaivan.ahmadi…
Question Number 141494 by Dwaipayan Shikari last updated on 19/May/21 $$\begin{pmatrix}{\mathrm{0}\:−\mathrm{1}}\\{\mathrm{0}\:\:\:\mathrm{0}}\end{pmatrix}!=\begin{pmatrix}{\mathrm{1}\:\:\gamma}\\{\mathrm{0}\:\:\mathrm{1}}\end{pmatrix}\:\:\:\:\:\:\gamma=\boldsymbol{{E}}{uler}\:{Mascheroni}\:{Constant} \\ $$$${What}\:{is}\:{the}\:{physical}\:{representation}\:{of}\:{a}\:{Matrix}\:{factorial}? \\ $$ Terms of Service Privacy Policy Contact: info@tinkutara.com
Question Number 75952 by mhmd last updated on 21/Dec/19 $${are}\:{this}\:\left({cent}\left({R}\right),+,.\right){identical}\:{in}\:{the}\:{ring}\:\left({R},+,.\right)\:? \\ $$$${pleas}\:{sir}\:{are}\:{you}\:{can}\:{help}\:{me}? \\ $$ Commented by kaivan.ahmadi last updated on 21/Dec/19 $${if}\:{c}\in{centR},{r}\in{R} \\ $$$$\Rightarrow{rcy}={ryc}={yrc}:\:\forall{y}\in{R} \\…
Question Number 75953 by mhmd last updated on 21/Dec/19 $${prove}\:{that}\:\left({C}\left({I}\right),+,.\right)\:{identical}\:{in}\:\left({R},+,.\right)? \\ $$ Terms of Service Privacy Policy Contact: info@tinkutara.com
Question Number 10409 by amir last updated on 07/Feb/17 Terms of Service Privacy Policy Contact: info@tinkutara.com