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anonymous
 5 years ago
Solve the given equation and indicate the number of values of θ sach that 0≤θ<2π satisfy the iquation cos(2θ)+cos(θ)=0
anonymous
 5 years ago
Solve the given equation and indicate the number of values of θ sach that 0≤θ<2π satisfy the iquation cos(2θ)+cos(θ)=0

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Vijay
 5 years ago
Best ResponseYou've already chosen the best response.0cos(2θ)+cos(θ)=0 2cos^2(θ)1+cos(θ)=0 2cos^2(θ)+cos(θ) 1=0 2cos^2(θ)2cos(θ)+cos(θ) 1=0 2cosθ [ cosθ1] +1 [ cos(θ1]=0 (2cosθ1)(cosθ1)=0 cosθ =1/2 or cosθ = 1 θ = π/3 or θ = 0
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