A and C
Step-by-step explanation:
Given
2cos²x - 2 = 0 ( add 2 to both sides )
2cos²x = 2 ( divide both sides by 2 )
cos²x = 1 ( take the square root of both sides )
cos x = ± = ± 1
cos x = 1 ⇒ x = (1) = 0°
cos x = - 1 ⇒ x = (- 1) = 180°
2 possible results
0° and 180°
2cos² x– 2 = 0 (add 2 to both sides)
2cos² x = 2 (divide both sides by 2)
cos² x = 2/2
cos² x = 1
cos x = ±√1
cos x = ±1
because the range of x is not stated, there are 2 possible results for x that will cause cos x to be either 1 or -1
part a
in a city ice cream is mostly only bought when the temperature is very high as ice cream cools down our
so we can derive the conclusion that as the temperature increases the number of ice creams sold also increases
part b
y intercept is 5
slope is 2
happy to
pls mark as brainliest
its a straight line parallel to the time axis