Answer:
cosA = 
Step-by-step explanation:
cosA =
=
=
= 
Answer:
It's not correct
Because
Ratio is the comparison of two quantities having same units
So this ratio can't be taken
Answer:
60°
Step-by-step explanation:
90°+30°=120°
180°_120°=60°
Assuming that all tiles must stay whole it would be:
1×54
2×27
3×18
6×9
Answer:
8.550
Step-by-step explanation: