SOLUTION: f(x)=2sin(1/3x-1/6π)，x∈R,α,β∈[0,π/2],f(3α+π/2)=10/13,f(3β+2π)=6/5,please work out cos(α+β)

SOLUTION: f(x)=2sin(1/3x-1/6π)，x∈R,α,β∈[0,π/2],f(3α+π/2)=10/13,f(3β+2π)=6/5,please work out cos(α+β)

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Question 467068: f(x)=2sin(1/3x-1/6π)，x∈R,α,β∈[0,π/2],f(3α+π/2)=10/13,f(3β+2π)=6/5,please work out cos(α+β)
Answer by Big Poop(157) (Show Source): You can put this solution on YOUR website!

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