👤

Aratati ca sin² 30° + cos² 60° = ½​

Răspuns :

sin^2 30°+ cos^2 60°= 1/2

Sin 30°= 1/2=> sin^2 30°= (1/2)^2= 1/4

cos^2 60°= (1/2)^2= 1/4

=> 1/4+1/4= 2/4= 1/2_____ (prin simplificare)

Baftă!

Răspuns:

sin30°=1/2

sin²30°=(1/2)²=1.4

cos60°=(1/2)

cos²60°=(1/2)²=1/4

sin²30°+cos²60=1/4+1/4=2/4=1/2

Explicație pas cu pas: