allerySec θ কোনটো ত্ৰিকোণমিতিক অনুপাতৰ অনন্যক?
Acos θ
Btan θ
Ccosec θ
Dsin θ
Answer & Solution
Correct answer: A. cos θ
Secant হ'ল 1-ক cosine-ৰে হৰণ, সন্নিহিত বাহুৰ ওপৰত অতিভুজ।
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