How do you find the amplitude, period, phase shift for y=cos3x?
1 Answer
Jun 20, 2017
graph{y=cos(3x) [-10, 10, -5, 5]}
Explanation:
- AMPLITUDE:
1 - PERIOD:
(2pi)/3 - HORIZONTAL SHIFTS: none
- VERTICAL SHIFTS: none
- TYPE: cosine graph
Guide
- AMPLITUDE = distance from middle of graph (y=0) to highest and lowest points on graph
- PERIOD = interval in which the graph repeats itself
period formula for cosine:(2pi)/|b|
b is the coefficient ofx
graph{y=cos(3x) [-10, 10, -5, 5]}