Proof that sin(theta+pie)/sin theta× cos theta =cot theta×tan pie +1
The number of pairs (a, b) of positive real numbers satisfying a4 + b4 < 1 and a2 + b2 > 1 is
The number of pairs (a, b) of positive real numbers satisfying a4 + b4 < 1 and a2
+ b2
> 1 is