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B
ymin=1−√22
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C
ymax=1+√24
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D
ymax=1+√22
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Solution
The correct options are Bymin=1−√22 Dymax=1+√22 y=cotθ(sin2θ+sinθcosθ)=cosθsinθ(sin2θ+sinθcosθ)=cosθ(sinθ+cosθ)=cosθsinθ+cos2θ=sin2θ2+1+cos2θ2=12+sin2θ+cos2θ2