JEE Mains · Maths · STD 11 - 10.2 parabola,ellipse,hyperbola
Let \(0 < \theta < \frac{\pi }{2}\). If the eccentricity of the hyperbola \(\frac{{{x^2}}}{{{{\cos }^2}\,\theta }} - \frac{{{y^2}}}{{{{\sin }^2}\,\theta }} = 1\) is greater than \(2\), then the length of its latus rectum lies in the interval
- A \(\left( {3,\infty } \right)\)
- B \(\left( {\frac{3}{2},2} \right]\)
- C \(\left( {2,3} \right]\)
- D \(\left( {1,\frac{3}{2}} \right]\)
Answer & Solution
Correct Answer
(A) \(\left( {3,\infty } \right)\)
Step-by-step Solution
Detailed explanation
\(\frac{{{x^2}}}{{{{\cos }^2}\theta }} - \frac{{{y^2}}}{{{{\sin }^2}\theta }} = 1\) \(\because \) \(e > 2\) (given) \({e^2} > 4 \Rightarrow 1 + \frac{{{{\sin }^2}\theta }}{{{{\cos }^2}\theta }} > 4\) \( \Rightarrow 1 + {\tan ^2}\theta > 4\) \( \Rightarrow {\tan ^2}\theta > 3\)…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Maths
- The eccentricity of an ellipse whose centre is at the origin is \(\frac{1}{2}\) . If one of its directices is \(x = - 4\) then the equation of the normal to it at \(\left( {1,\frac{3}{2}} \right)\) isJEE Mains 2017 Hard
- Let the image of the point \(\left(\frac{5}{3}, \frac{5}{3}, \frac{8}{3}\right)\) in the plane \(x-2 y+z-2=0\) be \(P\). If the distance of the point \(Q(6,-2, \alpha), \alpha > 0\), from \(P\) is 13 , then \(\alpha\) is equal to \(...........\).JEE Mains 2023 Hard
- Let \({f_k}\left( x \right) = \frac{1}{k}\left( {{{\sin }^k}x + {{\cos }^k}x} \right)\) where \(x \in R\;\) and \(k \ge 1\). Then \({f_4}\left( x \right) - {f_6}\left( x \right) \) is equalsJEE Mains 2014 Hard
- The angle of elevation of the top of a tower from a point \(A\) due north of it is \(\alpha\) and from a point \(B\) at a distance of \(9\) units due west of \(A\) is \(\cos ^{-1}\left(\frac{3}{\sqrt{13}}\right)\). If the distance of the point \(B\) from the tower is \(15\) units, then \(\cot \alpha\) is equal to.JEE Mains 2022 Hard
- Let the area of the region enclosed by the curve \(\mathrm{y}=\min \{\sin \mathrm{x}, \cos \mathrm{x}\}\) and the \(\mathrm{x}\)-axis between \(\mathrm{x}=-\pi\) to \(\mathrm{x}=\pi\) be \(\mathrm{A}\). Then \(\mathrm{A}^2\) is equal to ...........JEE Mains 2024 Hard
- If the equation of the line passing through the point \(\left(0,-\frac{1}{2}, 0\right)\) and perpendicular to the lines \(\vec{r}=\lambda(\hat{i}+a \hat{j}+b \hat{k})\) and \(\overrightarrow{\mathrm{r}}=(\hat{\mathrm{i}}-\hat{\mathrm{j}}-6 \hat{\mathrm{k}})+\mu(-b \hat{\mathrm{i}}+\mathrm{a} \hat{\mathrm{j}}+5 \hat{\mathrm{k}})\) is \(\frac{\mathrm{x}-1}{-2}=\frac{\mathrm{y}+4}{\mathrm{~d}}=\frac{\mathrm{z}-\mathrm{c}}{-4}\), then \(\mathrm{a}+\mathrm{b}+\mathrm{c}+\mathrm{d}\) is equal to:JEE Mains 2025 Hard
More PYQs from JEE Mains
- Let \(S = \{z \in \mathbb{C} : z^2 + \sqrt{6}\,iz - 3 = 0\}\). Then \(\sum\limits_{z \in S} z^8\) is equal to :JEE Mains 2026 Medium
- Let \(\mathrm{f}:(-1, \infty) \rightarrow \mathrm{R}\) be defined by \(\mathrm{f}(0)=1\) and \(f(x)=\frac{1}{x} \log _{e}(1+x), x \neq 0 .\) Then the function \(f\)JEE Mains 2020 Hard
- The number of points, where the function \(f: R \rightarrow R , f ( x )=| x -1| \cos | x -2| \sin | x -1|+\) \((x-3)\left|x^{2}-5 x+4\right|\), is NOT differentiable, is.JEE Mains 2022 Hard
- \(A , B, C\) try to hit a target simultaneously but independently. Their respective probabilities of hitting targets are \(\frac{3}{4},\frac{1}{2},\frac{5}{8}\). The probability that the target is hit by \(A\) or \(B\) but not by \(C\) isJEE Mains 2013 Medium
- Let the area enclosed between the curves \(|y|=1-x^2\) and \(x^2+y^2=1\) be \(\alpha\). If \(9 \alpha=\beta \pi+\gamma ; \beta, \gamma\) are integers, then the value of \(|\beta-\gamma|\) equals.JEE Mains 2025 Medium
- A circle passing through the point \(P (\alpha, \beta)\) in the first quadrant touches the two coordinate axes at the points \(A\) and \(B\). The point \(P\) is above the line \(A B\). The point \(Q\) on the line segment \(A B\) is the foot of perpendicular from \(P\) on \(A B\). If \(P Q\) is equal to \(11\) units, then the value of \(\alpha \beta\) is \(.............\).JEE Mains 2023 Hard