Question

identidades trigonométricas básicas

sec α (1+sen²α) =cos α

Answer 1

Hola !! ^^

※ Sec α = 1/ cos α
※ Sen^2 α + cos^2 α =1

=> Resolviendo :

Sec α (1+sen^2 α) = cos α
1/cos α (1+ 1-cos^2 α) = cos α

2- cos^2 α = cos^2 α
2= 2 cos^2 α
1= cos^2 α

Espero te sirva !! ··