AP EAMCET · Maths · Trigonometric Ratios & Identities
In \(\triangle A B C, r r_1 \cot \frac{A}{2}+r r_2 \cot \frac{B}{2}+r r_3 \cot \frac{C}{2}=\)
- A \(3 \Delta\)
- B 3 S
- C \(\frac{\mathrm{S}}{\Delta}\)
- D \(\Delta\)
Answer & Solution
Correct Answer
(A) \(3 \Delta\)
Step-by-step Solution
Detailed explanation
\(r_1 \cot \frac{\mathrm{~A}}{2}+r r_2 \cot \frac{\mathrm{~B}}{2}+r r_3 \cot \frac{\mathrm{C}}{2}\)…
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 angle of elevation of an object from a point \(P\) on the level ground is \(\alpha\). Moving \(d\) metres on the ground towards the object, the angle of elevation is found to be \(\beta\). Then the height (in metres) of the object isAP EAMCET 2007 Medium
- If \(\bar{a}=2 \bar{i}-\bar{j}+6 \bar{k} ; \bar{b}=\bar{i}-\bar{j}+\bar{k}\) and \(\bar{c}=3 \bar{j}-\bar{k}\), then \(\bar{a} \times \bar{b}+\bar{b} \times \bar{c}+\bar{c} \times \bar{a}=\)AP EAMCET 2025 Medium
- If and , thenAP EAMCET 2022 Medium
- If the vectors \(2 \overline{\mathrm{i}}+4 \overline{\mathrm{j}}-3 \overline{\mathrm{k}},-\overline{\mathrm{i}}+2 \overline{\mathrm{j}}+3 \overline{\mathrm{k}}\) and \(\mathrm{p} \overline{\mathrm{i}}-2 \overline{\mathrm{j}}+\overline{\mathrm{k}}\) are coplanar, then the unit vector in the direction of the vector \(9 p \bar{i}-4 \bar{j}+4 \bar{k}\) isAP EAMCET 2025 Medium
- A three digit number \(n\) is such that the last two digits of it are equal and differ from the first. The number of such \(n\) 's isAP EAMCET 2005 Easy
- The locus of the incentre of the triangle formed by the lines \(x y-4 x-4 y+16=0\) and \(x+y=5\) isAP EAMCET 2022 Medium
More PYQs from AP EAMCET
- A gaseous mixture has 2 moles of oxygen and 4 moles of Argon at a temperature \(\mathrm{T}\). Neglecting all vibrational modes of the molecules, the total internal energy of the system is
(R-Universal gas constant)AP EAMCET 2018 Easy - \(\mathrm{Ba}, \mathrm{Ca}, \mathrm{Sr}\) form halide hydrates. Their formulae are \(\mathrm{BaCl}_2\), \(x \mathrm{H}_2 \mathrm{O}, \mathrm{CaCl}_2 y \mathrm{H}_2 \mathrm{O}, \mathrm{SrCl}_2, \mathrm{zH}_2 \mathrm{O}\). The values of \(\mathrm{x}, \mathrm{y}, \mathrm{Z}\) respectively areAP EAMCET 2024 Easy
- If \(\omega\) is a complex cube root of unity, then \(\sin \left\{\left(\omega^{10}+\omega^{23}\right) \pi-\frac{\pi}{4}\right\}=\)AP EAMCET 2020 Easy
- If \(P\) divides the line segment joining the points \(A(1,2,-1)\) and \(B(-1,0,1)\) externally in the ratio \(1: 2\) and \(Q=(1,3,-1)\), then \(P Q=\)AP EAMCET 2022 Easy
- In anionic polymerisation, the compound which acts as effective chain initiator isAP EAMCET 2018 Easy
- If a body cools from a temperature of \(62^{\circ} \mathrm{C}\) to \(50^{\circ} \mathrm{C}\) in 10 minutes and to \(42^{\circ} \mathrm{C}\) in the next 10 minutes, then the temperature of the surroundings isAP EAMCET 2025 Easy