x= 12 ×sin 43 = 8.18 m
cos 43 = x/ 12
x = 12 ×cos 43 = 8.77 m
2- tan 30= 10/x
x= 17.3
tan 10/y
y= 10
17.3 – 10 = 7.3 m
3- x+27+ 5x+- 17 =90
6x + 10 = 90
6x= 90-10
6x= 80
x= 80/6
= 40/3
cos 120 = -1/2
tan 225 = 1
cosec 330 = -2
cos 300 1/2
1+1/2+-1/2+-2=1-