Question

Pt mate
Va rog
Ms
Bafta la exameenn

Answer 1

Răspuns:

Explicație pas cu pas:

a)sin 120°=sin (180°-60°)=sin 60°=√3/2

cos 120°=cos (180°-60°)=-cos60°=-1/2

tg 120°=-√3

ctg 120°=-√3/3

b) sin 135°=sin (180°-45°)=sin 45°=√2/2

cos135°=cos(180°-45°)=-cosc45°=-√2/2

tg 135°=-1

ctg 135°=-1

c) sin 150°=sin (180°-30°)=sin 30°=1/2

cos 150°=cos(180°-30°)=-cos30°=-√3/2

tg 150°=-√3/3

ctg150°=-√3

d)sin 180°=0

cos180°=-1

tg 180= 0

ctg180° nu are sens  nu se poate imparti cu 0