q(t) = 0,2 • 10-€ sin(8 • 10° mt + n/6)

where:

• q(t) represents the quantity in euros at time t
• n is the phase angle in degrees
• t is the time in seconds
• m is the frequency in hertz

Given the equation q(t) = 0.2 • 10^-€ sin(8 • 10° mt + n/6), we can see that the quantity q(t) is a sinusoidal function with an amplitude of 0.2 • 10^-€, a frequency of 8 • 10° m Hz, and a phase angle of n/6 degrees.

This equation represents a periodic function that oscillates with time t. The amplitude determines the maximum value of the function, while the frequency and phase angle determine the rate and starting point of the oscillation, respectively.