The (blank) of vibration of a wave is defined as that which has the lowest frequency

the Fundamental Frequency of vibration of a wave is defined as that which has the lowest frequency

Explanation:

As we know that the frequency of vibrations on a string is given as

now we know that

N = number of harmonics

v = speed of the wave

L = length of the string

So here for the lowest frequency of the wave we know that

N = 1

so lowest frequency of the wave is known as fundamental frequency of the wave

the Fundamental Frequency of vibration of a wave is defined as that which has the lowest frequency

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y