θ সূক্ষ্মকোণ হলে নিচের কোন সম্পর্কটি সঠিক?

A sin2 θ + cos2 θ = 1

B sin θ + cos θ < 1

C tan2 θ - sec2 θ = 1

D sin2 θ + cos2 θ > 1

Solution

Correct Answer: Option A

আমরা জানি,
sin2 θ + cos2 θ = 1

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