Share The Formula You Found

+Label +Description

Recently Referred Formulae

1
\{b_j\}
i,j
\sin x=\frac{2t}{1+t^2}\ ,\ \ \cos x=\frac{1-t^2}{1+t^2}\ ,\ \ \frac{dx}{dt}=\frac{2}{1+t^2}
t=\tan\frac{x}{2}