Question Number 109353 by mathdave last updated on 22/Aug/20 Commented by mnjuly1970 last updated on 22/Aug/20 $${excellent}\:\:{thank}\:{you}… \\ $$ Commented by mnjuly1970 last updated on…
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Question Number 109336 by Rasikh last updated on 22/Aug/20 Commented by Ari last updated on 22/Aug/20 x=2 Commented by Ari last updated on 22/Aug/20 x=4…
Question Number 174871 by Ml last updated on 13/Aug/22 Answered by Rasheed.Sindhi last updated on 13/Aug/22 $${a}_{\mathrm{15}} =\mathrm{32},\:\:\:{S}_{\mathrm{9}} +{S}_{\mathrm{29}} =\mathrm{100},\:\:{a}_{\mathrm{23}} =? \\ $$$$\underline{{Assuming}\:{a}_{{n}} \:{an}\:{AP}} \\…
Question Number 109337 by ZiYangLee last updated on 22/Aug/20 $${x}=\mathrm{cos}\theta,\:\mathrm{where}\:\frac{\mathrm{3}\pi}{\mathrm{2}}<\theta<\mathrm{2}\pi,\:\mathrm{and}\:\mathrm{that}\:\mathrm{2cos}\theta−\mathrm{sin}\theta=\mathrm{2}, \\ $$$$\mathrm{show}\:\mathrm{that}\:\sqrt{\mathrm{1}−{x}^{\mathrm{2}} }=\mathrm{2}\left(\mathrm{1}−{x}\right). \\ $$$$\mathrm{Hence}\:\mathrm{or}\:\mathrm{otherwise},\:\mathrm{find}\:{x}\:\mathrm{and}\:\mathrm{deduce}\:\mathrm{that}\:\mathrm{tan2}\theta=\frac{\mathrm{24}}{\mathrm{7}} \\ $$ Answered by Aziztisffola last updated on 22/Aug/20 $$\sqrt{\mathrm{1}−{x}^{\mathrm{2}}…
Question Number 109329 by mohammad17 last updated on 22/Aug/20 $${if}\:{all}\:{A},{B}\:{be}\:{a}\:{set}\:{prove}\:{that}\left(\:{A}^{{B}} =\:\emptyset\leftrightarrow{A}=\emptyset\:{and}\:{B}=\emptyset\right)\: \\ $$$${help}\:{me}\:{sir}\: \\ $$ Commented by kaivan.ahmadi last updated on 22/Aug/20 $${hi}\:{sir}.\:{what}\:{is}\:{the}\:{meaning}\:{of}\:{A}^{{B}} ? \\…
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Question Number 174844 by daus last updated on 12/Aug/22 Commented by daus last updated on 12/Aug/22 $${pls}\:{help}\:{for}\:{D}\: \\ $$$${a}^{{k}} \:+\:{a}^{{k}+\mathrm{2}} \:+…..\:{n}^{{th}} \:{term} \\ $$ Answered…
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