Answer:
........-9| < |9| is not true
Use the ratio of cosine.
cos x = adj/hyp
cos 60 = x/14
14 (cos 60) = x
7 = x
length of DF is 7.
Hope this helps :)
Answer:
Step-by-step explanation:
Do you have a picture of the diagram so I can see where the 300 and 10 are placed :D ?
Step-by-step explanation:
There is a pattern involved here.
1+4 = 5
2nd step :2+5 = 7
Add 5 and 7 i.e 12
3rd step: 6+3 = 9
Add 9 and 12 i.e 21
4th step :8+11 = 19
Add 21 and 19 i.e 40
1+4=5
2+5= 12
3+6= 21
8+11=40