Answer:

Step-by-step explanation:
Cos is Adjacent over Hypotenuse, (see picture below)
x/xsqrt(2)
1/sqrt(2)
sqrt(2)/2
Answer:

Step-by-step explanation:
Before calculating the scale we require the dimensions to be in the same units.
Using the conversion
1 yard = 3 ft and
1 foot = 12 inches, then
5 yards = 5 × 3 × 12 = 180 inches
The scale is then
2 in : 180 in ← divide both quantities by 2
= 1 : 90
= 
=-35(4s-t)+21(4s-t)
=-140s+35t+84s-21t
=-140s+84s+35t-21t
=-56s+14t
Answer:
the answer is 45
Step-by-step explanation:
(180/4)=45