Question

1. sin 30°+cos60° =
2. tg45°+ctg45°=
3. sin^2 45°+cos^2 45°=
4. sin^2 60°+cos^2 60°=
5. tg^2 60°+tg^2 45°=
6. sin^2 60°+sin^2 30°+sin^2 45°=
Va rog e URGENT!!!!

Answer 1

Răspuns:

Explicație pas cu pas:

1. sin 30°+cos60° =1/2+1/2=1

2. tg45°+ctg45°=1+1=2

3. sin² 45°+cos² 45°=1

4. sin² 60°+cos² 60°=1

5. tg²60°+tg² 45°=(√3)²+1=3+1=4

6. sin² 60°+sin² 30°+sin² 45°=(√3/2)²+(1/2)²+(√2/2)²=3/4+1/4+2/4=6/4=3/2