Question Number 79055 by gopikrishnan last updated on 22/Jan/20
![The number of real numbers in [0,2pi] satisfying sin^(−1) x−2sin^2 x+1=0 is](https://www.tinkutara.com/question/Q79055.png)
$${The}\:{number}\:{of}\:{real}\:{numbers}\:{in}\:\left[\mathrm{0},\mathrm{2}{pi}\right]\:{satisfying}\:\mathrm{sin}^{−\mathrm{1}} {x}−\mathrm{2}{sin}^{\mathrm{2}} {x}+\mathrm{1}=\mathrm{0}\:{is} \\ $$
Commented by mr W last updated on 22/Jan/20
$${sir}:\:{i}\:{asked}\:{you}\:{repeatedly}\:{not}\:{to} \\ $$$${write}\:{the}\:{whole}\:{post}\:{in}\:{a}\:{single}\:{line}. \\ $$$${but}\:{you}\:{seem}\:{to}\:{ignore}\:{that}\:{and}\:{even} \\ $$$${don}'{t}\:{give}\:{a}\:{comment}.\:{what}\:{a}\:{pity}! \\ $$$${now}\:{i}\:{just}\:{ask}\:{other}\:{members}\:{of}\:{the} \\ $$$${forum}\:{not}\:{to}\:{answer}\:{your}\:{posts}. \\ $$
Commented by john santu last updated on 22/Jan/20
$${it}\:{seems}\:{like}\:{he}\:{ignored}\:{it} \\ $$
Commented by mr W last updated on 23/Jan/20
$${why}\:{absolutely}\:{no}\:{communication}? \\ $$$${maybe}\:{you}\:{have}\:{reasons}\:{for}\:{that}\:{what} \\ $$$${you}\:{did},\:{then}\:{tell}\:{us}!\:{let}\:{us}\:{understand} \\ $$$${you}! \\ $$$${it}'{s}\:{not}\:{my}\:{purpose}\:{to}\:{boycott}\:{you}\:{in} \\ $$$${this}\:{forum}!\:{we}\:{should}\:{only}\:{respect} \\ $$$${each}\:{other}.\:{i}\:{do}\:{what}\:{you}\:{request}\:{and} \\ $$$${you}\:{do}\:{what}\:{i}\:{request}.\:{that}'\:{the}\:{rule}! \\ $$