Question

Ex. b) E=sin30+3cos60+tg45°-ctg45 ex. c) E=tg60° ori sin45°-sin30° supra sin 60°​

Answer 1

b)

sin 30°=1/2

cos 60°=1/2

tg 45° =1

ctg 45°=1

E=1/2+1/2+1-1=1

c)tg 60°= radical din 3

sin 45°=radical din 2/2

sin 30°=1/2

sin 60°= radical din 3/2