Three boys A, B and C are throwing ball to each other. A always throws the ball to B and B always throws the ball to C. But C is j...
Let φ be the Euler function. Calculate φ(77).
0.004368 to 3 significant figures
φ(77)
show\:that\:\sqrt{180}-\sqrt{80}\:\div \sqrt{5}\:is\:an\:integer\:and\:find\:its\:value
sin( $\pi$/2 + α =
resolve the serie $$\sum_{n=0}^{ $\infty$ }{((sin²n))/(n*n^(1/2))}$$
(- ∞, - 1/6)
$$\sum_{n=0}^{ $\infty$ }{((sin²n))/(n*n^(1/2))}$$
