One formula for finding the length of the arc is:
where s is the length of the arc, r is the radius of the circle, and
is the measure of the central angle in radians. So, in this case, we have:
The arc measures
14 units.
(I)
firstly , we will find maximum and minimum y-value
we can see that
maximum value is 5
minimum value is -5
so, we can find amplitude
..........Answer
(II)
we know that
wave length is the length of one wave
we can see that from B to F , there is one wave
and we are given it's length as 20cm
so, wavelength is 20cm......Answer
(III)
we know that
we are given
frequency =100hz
wavelength =20cm
now, we can find velocity
............Answer
36+48 is the only right answer here
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