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Distance of the point (tanθ, 1) from origin is A) cotθ B) sinθ C) tanθ D) secθ |
Answer» Correct option is (D) sec θ Distance of point \(A(tan\,\theta,1)\) from origin O(0, 0) is \(AO=\sqrt{(0-tan\,\theta)^2+(0-1)^2}\) (By distance formula) \(=\sqrt{tan^2\,\theta+1}\) \(=\sqrt{sec^2\,\theta}\) \((\because1+tan^2\,\theta=sec^2\,\theta)\) \(=sec\,\theta\) Hence, distance of the point \((tan\,\theta,1)\) from origin is \(sec\,\theta.\) Correct option is D) secθ |
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