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π2+52(cosθ+sinθ)π+21=0
π2-52(cosθ+sinθ)π-21=0
π2+52(cosθ+sinθ)π-21=0
π2+52(cosθ+sinθ)π+21=0
π2-52(cosθ+sinθ)π+21=0
ANS : 5
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