inv-trig

Related Questions

• If $2{{\cos }^{-1}}\sqrt{\frac{1+x}{2}}=\frac{\pi }{2},$then $x=$

  ---

• If ${{\tan }^{-1}}\frac{x-1}{x+1}+{{\tan }^{-1}}\frac{2x-1}{2x+1}={{\tan }^{-1}}\frac{23}{36},$then $x =$

  ---

• The value of ${{\cos }^{-1}}(\cos 12)-{{\sin }^{-1}}(\sin 14)$ is

  ---

• If ${{\sin }^{-1}}x=\theta +\beta $and ${{\sin }^{-1}}y=\theta -\beta ,$then $1+xy=$

  ---

• For the equation ${{\cos }^{-1}}x+{{\cos }^{-1}}2x+\pi =0$, the number of real solution is

  ---