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If cos(α-β)+cos(β-γ)+cos(γ-α)=-3/2, then prove that cosα+cosβ+cosγ=0and sinα+sinβ+sinγ=0

20/07/2023

https://www.youtube.com/watch?v=tyJquzR4m0E
IIT-JEE Trigonometry
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If tan(α+θ)=n tan(α-θ), show that sin⁡2θ/sin⁡2α =(n-1)/(n+1)