12th Class
Mathematics
Sample Paper
Maths Olympiad Model Paper-1
question_answer
If \[{{\sin }^{-1}}\left( x-\frac{{{x}^{2}}}{2}+\frac{{{x}^{3}}}{4}-..... \right)+{{\cos }^{-1}}\left( {{x}^{2}}-\frac{{{x}^{4}}}{2}+\frac{{{x}^{6}}}{4}-..... \right)=\frac{\pi }{2},\] for \[0<|x|<\sqrt{2},\] then x equals: