calculate-I-a-0-2pi-1-acost-1-2acost-a-2-dt-1-if-a-lt-1-2-if-a-gt-1-

Question Number 37345 by math khazana by abdo last updated on 12/Jun/18

c a l c u l a t e I (a) = \int_{0}^{2 π} \frac{1 + a c o s t}{1 + 2 a c o s t + a^{2}} d t

1) i f ∣ a ∣< 1

2) i f ∣ a ∣> 1