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can you please solve question 1 as soon as possible

can you please solve question 1 as soon as possible

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Grade:11

2 Answers

Manish Tiwari
86 Points
5 years ago
The correct answer is B.
In order to solve the question properly you need to use the standard wave eqution in terms of w,lamda and t.
Khimraj
3007 Points
5 years ago
since cos2\Theta = ½(1 + cos2\Theta)
So
y = A/2[1+cos2(2πnt – 2π(x/\lambda)]
Then
y = A/2 + A/2[cos(4πnt – 4π(x/\lambda)]
So Amplitude is A/2
frequency is 2n
and wavelength is \lambda/2.
Hope it clears.

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