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If β is one of the angles between the normals to the ellipse, x2+3y2=9 at the points (3cosθ,√3sinθ) and (−3sinθ,√3cosθ); θ∈(0,π2); then 2cotβsin2θ is equal to |
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Answer» If β is one of the angles between the normals to the ellipse, x2+3y2=9 at the points (3cosθ,√3sinθ) and (−3sinθ,√3cosθ); θ∈(0,π2); then 2cotβsin2θ is equal to |
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