AP EAMCET · Maths · Vector Algebra
Let the position vectors of the vertices of a triangle \(A B C\) be \(\bar{a}, \bar{b}, \bar{c}\). If on the plane of the triangle, \(P\) is a point having position vector \(\bar{x}\) such that \(\bar{x} \cdot(\bar{c}-\bar{b})=\bar{a} \cdot \bar{c}-\bar{a} \cdot \bar{b}\) and \(\bar{x} \cdot(\bar{a}-\bar{c})=\bar{a} \cdot \bar{b}-\bar{b} \cdot \bar{c}\), then for the triangle \(A B C\), \(P\) is the
- A Centroid
- B Circumcentre
- C Incentre
- D Orthocentre
Answer & Solution
Correct Answer
(D) Orthocentre
Step-by-step Solution
Detailed explanation
\( (\bar{x}-\bar{a}) \cdot (\bar{c}-\bar{b}) = 0 \) \( \vec{AP} \perp \vec{BC} \) \( (\bar{x}-\bar{b}) \cdot (\bar{a}-\bar{c}) = 0 \) \( \vec{BP} \perp \vec{CA} \) Orthocentre
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
- If \(\theta=\cot ^{-1}(7)+\cot ^{-1}(8)+\cot ^{-1}(18)\), then \(\cot \theta\) is equal toAP EAMCET 2020 Medium
- If \((\alpha, \beta)\) is the orthocentre of the triangle with the vertices \((2,2),(5,1),(4,4)\), then \(\alpha+\beta=\)AP EAMCET 2024 Medium
- If \(\alpha, \beta, \gamma\) are the roots of the equation \(x^3+a x^2+b x+c=0\), then \(\alpha^{-1}+\beta^{-1}+\gamma^{-1}\) is equal toAP EAMCET 2002 Hard
- \(\frac{1+\cos \theta-\sin \theta}{1+\cos \theta+\sin \theta}+\frac{1+\cos \theta+\sin \theta}{1+\cos \theta-\sin \theta}=\)AP EAMCET 2023 Hard
- Which circle among the following bisects the circumference of the circle \(x^2+y^2-8 x-6 y+23=0\) ?AP EAMCET 2021 Easy
- Which of the following is false?
1. If \((a, b, c)\) are direction ratios of a line, then \(a^2+b^2+c^2 \neq 1\).
2. The direction cosines of a line can be its direction ratios but not vice-versa.
3. If \((l, m, n)\) is one set of direction cosines, then \((-l,-m,-n)\) is also a valid set.
4. If \(\left(l_1, m_1, n_1\right)\) and \(\left(l_2, m_2, n_2\right)\) are direction cosines of perpendicular lines, then \(l_1 l_2+m_1 m_2+n_1 n_2=1\).AP EAMCET 2020 Easy
More PYQs from AP EAMCET
- Let \(f(x)=\tan ^{-1}\left(\frac{1+\cos x}{\sin x}\right)\); \(g(x)=\tan ^{-1}\left(\frac{\sin x}{1-\cos x}\right)\), then \(\int(f(x)+g(x)) d x=\)AP EAMCET 2020 Easy
- The source of vitamin, whose deficiency causes scurvy isAP EAMCET 2023 Easy
- \(\int 3^x\left(f^{\prime}(x)+f(x) \log 3\right) d x\) is equal toAP EAMCET 2021 Medium
- One bar magnet is in simple harmonic motion with time period T in an earth's magnetic field. If its mass is increased by 9 times the time period becomesAP EAMCET 2024 Medium
- In triangle ABC, if \(\mathrm{a}=13, \mathrm{~b}=8, \mathrm{c}=7\), then \(\cos (\mathrm{B}+\mathrm{C})=\)AP EAMCET 2025 Medium
- An object of mass \(2 m\) is projected with a speed of \(100 \mathrm{~ms}^{-1}\) at an angle \(\theta=\sin ^{-1}\left(\frac{3}{5}\right)\) to the horizontal. At the highest point, the object breaks into two pieces of same mass \(m\) and the first one comes to rest. The distance between the point of projection and the point of landing of the bigger piece (in metre) is
(Given, \(g=10 \mathrm{~m} / \mathrm{s}^2\) )AP EAMCET 2007 Hard