Question

A simple wave motion is represented by y 5 sin 4 t 3 cos4 t       . Its amplitude is 1) 5 units 2) 5 3 units 3) 10 3 units 4) 10 units

Answer 1

Answer:

y=5(sin4πt+

3

cos4πt)

=5×2(

2

1

sin4πt+

2

3

cos4πt)

=10(cos

3

π

sin4πt+sin

3

π

cos4πt)

=10sin(4πt+

3

π

)

Hence the amplitude of the wave is 10.

Answer 2

Answer:

Dont worry about the equation

Explanation:

Just take the resultant from the given prefixes

ampliitude =√ (5² +[5√3]²)

                 =√(25 +75)

                  = 10