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The sum of all values of θ ∈ (0, π/2) satisfying sin2 2θ + cos4 2θ = 3/4 is

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The sum of all values of θ ∈ (0, π/2) satisfying sin22θ + cos42θ = 3/4 is 

A) π 

B)π/2 

C)3π/8 

D) 5π/4

 

 

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