I am struggling with a question on my electrical engineering course. The question requires me to 'draw at least two cycles of this signal and annotate the drawing so that your non-technical colleagues may understand the relevant information it contains. It asks me to use the graphing calculator Desmos | Graphing Calculator
the question is as follows...
one of your labratory instantaneous test signal voltages (Vs) is described by the equation....
Vs = 8sin (2 π f t - ( π / 4)
where f=500kHz and t represents time.
Make t the subject and hence determine the first point in time when the instantaneous signal voltage has a magnitude of +5v.
I have ended up with...
t = (sin^-1(5/8)+ π/4) / 2 π f
f = 5 x 10^5
I then get 4.649005 x10^-7
I am now unsure how to input this in to the graphing calculator?!
Any help would be much appreciated.