Two Waves Travel Simultaneously Through the Same Medium

question 17

Multiple Choice

Two waves travel simultaneously through the same medium. The first wave is described by y₁(x,t) = Acos(kx-ωt) and the second wave by y₂(x,t) = B sin(kx-ωt) . If the resulting superposition can be written as y(x,t) = C cos(kx-ωt + π/5) , what is the value of A/B?

• A)sin(π/5)
• B)cos(π/5)
• C)cot(π/5)
• D)sec(π/5)
• E)tan(π/5)

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