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solve (cos Θ + cos Θ)2 + (cos Θ + cos Θ)2 A. sin2 Θ B. 4 C. 8cos2Θ D. cos2 Θ

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YolandeSehl667

hello :  note : the question is ' simplify ' on "solve" (cos Θ + cos Θ)2 + (cos Θ + cos Θ)2=(2cosΘ)² + (2cosΘ)²   = 4cos²Θ + 4cos²Θ = 8cos²Θ.....(answer : C )

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