Answer:
20 - 8x
Step-by-step explanation:
Use the distribution property
8 - 8x + 12
x=30o+n90on∈Z
cos2x=sin(90o−2x)=sin(2x−30o)
Which mean 90o−2x=2x−30o+n360o
or 90o−2x+2x−30o=(2n+1)180o
The later cannot be true.
so x=30o+n90on∈Z
43 46 34 98 78 67
area=13.8cm^2
