Question

What is the maximum value of the transformed function, y = -3cos (2x - 8) + 5

A. 3 units
B. 5 units
C. 8 units
D. 11 units

Answer 1

C. 8 units.

Explanation:

The maximum value of the cosine ( cos) function is 1

So, for y = 3cos(2x - 8) + 5

Maximum value is 3 *1 + 5 = 8.

y = -3cos(2x - 8) + 5 is the above graph reflected in the y axis so the maximum value is also 8.