A sec2θ= 1+tan2θ
B sec2θ= 1 - tan2θ
C tanθ= cosθ/sinθ
D sin2θ - cos2θ = 1
Correct Answer: Option A
আমরা জানি, sec2θ - tan2θ= 1
so, sec2θ = 1 + tan2θ
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