please divide pie/90
Answers
Answer:
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Step-by-step explanation:
You mean how is pi/2 equiverlent to 90 degrees?
They are two different units for angles. Just like temperature in degrees C and degrees F.
The angle using pi is from 0 to 2pi.
pi = circumference in mm / diameter in mm so it has no units.
The equivalent angle in degrees is from 0 to 360 degrees.
The value of pi is the amplitude of the sine of the graph of sine versus time. The number of cycles in one second is the frequency.
The amplitude is plus or minus pi.
If there are 4 cycles with 4 peaks and 4 troughs the frequency is 4 hertz.
A circle represents one cycle. has a infinite different frequencies as it can rotate at any speed.
So if the wheel turns at 4 revolutions or cycles per second it has a frequency of 4 hertz.
The wheel turns though 90 degrees which is a quarter of the plus or minus pi cycle, this is 2 pi/4 or pi/2.
A circle has no start and end points in its circumference. If a point on its circumference at 90 degrees on its left hand side is drawn as a dot and the circle is rotated at a constant speed and then moved to the right at a constant speed, it will draw a sine wave.