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Question-22968

Question Number 22968 by Bruce Lee last updated on 24/Oct/17 Commented by Bruce Lee last updated on 24/Oct/17 $$\boldsymbol{{suppose}}. \\ $$$$\:\boldsymbol{{we}}\:\boldsymbol{{have}}\:\boldsymbol{{any}}\:\boldsymbol{{equation}}…….. \\ $$$$ \\ $$$$\boldsymbol{{plz}}\:\boldsymbol{{help}}…

49-x-5-x-2-2-36-x-5-x-1-2-85-

Question Number 154036 by liberty last updated on 13/Sep/21 $$\:\mathrm{49}\left(\frac{{x}+\mathrm{5}}{{x}−\mathrm{2}}\right)^{\mathrm{2}} +\mathrm{36}\left(\frac{{x}+\mathrm{5}}{{x}−\mathrm{1}}\right)^{\mathrm{2}} =\:\mathrm{85} \\ $$ Answered by Rasheed.Sindhi last updated on 13/Sep/21 $$ \\ $$$$\:\mathrm{49}\left(\frac{{x}+\mathrm{5}}{{x}−\mathrm{2}}\right)^{\mathrm{2}} +\mathrm{36}\left(\frac{{x}+\mathrm{5}}{{x}−\mathrm{1}}\right)^{\mathrm{2}}…

1-cos-pi-8-1-cos-3pi-8-1-cos-5pi-8-1-cos-7pi-8-

Question Number 88503 by jagoll last updated on 11/Apr/20 $$\left(\mathrm{1}+\mathrm{cos}\:\frac{\pi}{\mathrm{8}}\right)\left(\mathrm{1}+\mathrm{cos}\:\frac{\mathrm{3}\pi}{\mathrm{8}}\right)\left(\mathrm{1}+\mathrm{cos}\:\frac{\mathrm{5}\pi}{\mathrm{8}}\right)\left(\mathrm{1}+\mathrm{cos}\:\frac{\mathrm{7}\pi}{\mathrm{8}}\right) \\ $$$$ \\ $$ Commented by john santu last updated on 11/Apr/20 $$\mathrm{cos}\:\frac{\mathrm{7}\pi}{\mathrm{8}}=\mathrm{cos}\:\left(\pi−\frac{\pi}{\mathrm{8}}\right)=\:−\mathrm{cos}\:\frac{\pi}{\mathrm{8}} \\ $$$$\mathrm{cos}\:\frac{\mathrm{5}\pi}{\mathrm{8}}\:=−\mathrm{cos}\:\frac{\mathrm{3}\pi}{\mathrm{8}}…