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Question Number 23009 by ajfour last updated on 25/Oct/17 Commented by ajfour last updated on 25/Oct/17 $${For}\:\:\:{Q}.\mathrm{22929} \\ $$ Commented by selestian last updated on…
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Question Number 88507 by jagoll last updated on 11/Apr/20 $$\mathrm{cos}\:^{\mathrm{2}} \mathrm{12}^{\mathrm{o}} +\mathrm{cos}\:^{\mathrm{2}} \mathrm{24}^{\mathrm{o}} +\mathrm{cos}\:^{\mathrm{2}} \mathrm{48}^{\mathrm{o}} +\mathrm{cos}\:^{\mathrm{2}} \mathrm{84}^{\mathrm{o}} \\ $$ Commented by john santu last updated…
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 $$\mathrm{cos}\:\frac{\mathrm{7}\pi}{\mathrm{8}}=\mathrm{cos}\:\left(\pi−\frac{\pi}{\mathrm{8}}\right)=\:−\mathrm{cos}\:\frac{\pi}{\mathrm{8}} \\ $$$$\mathrm{cos}\:\frac{\mathrm{5}\pi}{\mathrm{8}}\:=−\mathrm{cos}\:\frac{\mathrm{3}\pi}{\mathrm{8}}…
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Question Number 22940 by selestian last updated on 24/Oct/17 Commented by ajfour last updated on 24/Oct/17 $${T}_{{r}} =\mathrm{tan}^{−\mathrm{1}} \left(\frac{\mathrm{2}^{{r}−\mathrm{1}} }{\mathrm{1}+\mathrm{2}^{\mathrm{2}{r}−\mathrm{1}} }\right) \\ $$$$\Rightarrow\:\:\mathrm{tan}\:{T}_{{r}} =\frac{\mathrm{2}^{{r}} −\mathrm{2}^{{r}−\mathrm{1}}…
Question Number 22778 by selestian last updated on 22/Oct/17 Commented by selestian last updated on 22/Oct/17 $${plz}\:{solve}\:{this}\:{i}\:{am}\:{trying}\:{to}\:{do}\:{by} \\ $$$${uing}\:{n}=\mathrm{3}\:{but}\:{its}\:{not}\:{working} \\ $$$$ \\ $$ Commented by…
Question Number 22742 by selestian last updated on 22/Oct/17 Answered by Sahib singh last updated on 22/Oct/17 $$\frac{\mathrm{3}}{\mathrm{4}}\:\:? \\ $$ Commented by math solver last…
Question Number 22729 by selestian last updated on 22/Oct/17 Commented by math solver last updated on 22/Oct/17 $$\mathrm{0} \\ $$ Commented by selestian last updated…