Webr1 Q.84 If r1, r2, r3 be the radii of excircles of the triangle ABC, then is equal to : r1r2 A A B A A (A) cot 2 (B) cot 2 cot 2 (C) tan 2 (D) tan 2 Q.85 Minimum value of 8cos2x + 18sec2x x R wherever it is defined, is : WebMar 19, 2024 · Add a comment 1 Answer Sorted by: 0 Cauchy-Schwarz, or just ( a − b) 2 ≥ 0, implies a 2 + b 2 ≥ 2 a b, and so on for b, c and c, a. Add them all up we got 2 ( a 2 + b 2 + c 2) ≥ 2 ( a b + b c + c a), which means a b + b c + c a a 2 + b 2 + c 2 ≤ 1. That would solve your last step. And Xander was right, try to post in LaTeX markup. Share Cite Follow
In a triangle ABC, if r_1 = 2r_2 = 3r_3 then what is a:b?
WebDec 15, 2024 · Given that r1,r2,r3 are radii of ex-circles . we have the following relations. r1 = Δ s −a,r2 = Δ s − b,r3 = Δ s − c. where Δ is the area of the triangle ABC having lengths of … WebIf (r2–r1) (r3–r1) = 2r2r3. Show that A = 90. please give the answer avinash, 5 years ago Grade:11 2 Answers Harsh Patodia IIT Roorkee askIITians Faculty 907 Points 5 years ago Abin Beni 13 Points 4 years ago Do the same and at the last step 0 = (b^2+c^2-a^2) TO proove angle A=90 Divide by 2bc, 0 = (b^2+c^2+a^2)/2bc nouns adjectives verbs adverbs
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WebIn a triangle, if r1 = 2r2 = 3r3, then ba + cb + ac is equal to 2475 46 BITSAT BITSAT 2008 Report Error A 6075 B 60155 C 60176 D 60191 Solution: Given that, r1 = 2r2 = 3r3 ∴ s−aΔ = s−b2Δ = s−c3Δ = kΔ Then, s−a = k,s− b = 2k,s−c = 3k ⇒ 3x −(a+ b+ c) = 6k ⇒ s = 6k ∴ 5a = 4b = 3c = k Now, ba + cb + ac = 45 + 34 + 53 = 6075+80+36 = 60191 WebMathematics In a triangle, if r1 = 2 r2 = 3r3, then (a/b) + (b/c) + (c/a) is equal to Q. In a triangle, if r1 = 2r2 = 3r3, then ba + cb + ac is equal to 2475 46 BITSAT BITSAT 2008 … WebIn A Triangle If R1 2r2 3r3 Then A B B C C A Is Equal To In a triangle, if r 1 = 2r 2 = 3r 3, then a/b + b/c + c/a is equal to 1) 75/60 2) 155/60 3) 176/60 4) 191/60 Solution: Given r 1 = 2r 2 … how to sight in a rifle scope with two shots