Answer:
7 3/4
Step-by-step explanation:
10.5-2.75=7.75= 7 3/4
Answer:
False and no solution exists
Step-by-step explanation:
Answer:
x =15 + 30n
Step-by-step explanation:
8cos(12x)+4=-4
Subtract 4 from each side
8cos(12x)+4-4=-4-4
8cos(12x)=-8
Divide by 8
8/8cos(12x)=-8/8
cos(12x) = -1
Take the arccos on each side
arccos(cos(12x)) = arccos(-1)
12x = 180 degrees
But we can go around in a circle of 360 and get the same result
12 x = 180+360n where n is an integer
Divide each side by 12
x = 180/12 +360n/12
x =15 + 30n
Answer:
Step-by-step explanation:
Tip: When 
, 
is also true.
| <em>Original equation</em>
| <em>Use tip</em>
