Properties of TriangleHard
Question
Let ABC be a triangle such that ∠ACB = 
and let a, b and c denote the lengths of the sides opposite to A,B and C respectively. The value(s) of x for which a = x2 + x + 1, b = x2 - 1 and c = 2x + 1 is (are)
and let a, b and c denote the lengths of the sides opposite to A,B and C respectively. The value(s) of x for which a = x2 + x + 1, b = x2 - 1 and c = 2x + 1 is (are)Options
A.−(2 + √3)
B.1 + √3
C.2 + √3
D.4√3
Solution
Using cosine rule for ∠C
⇒ (√3 - 2)x2 + (√3 - 2)x + (√3 +1) = 0
⇒ x =
⇒ x = - (2 + √3), 1 + √3 ⇒ x = 1 + √3 as (x > 0).
⇒ (√3 - 2)x2 + (√3 - 2)x + (√3 +1) = 0
⇒ x =
⇒ x = - (2 + √3), 1 + √3 ⇒ x = 1 + √3 as (x > 0).
Create a free account to view solution
View Solution FreeMore Properties of Triangle Questions
If c2 = a2 + b2, then 4s (s − a)(s − b) (s − c) =...The inradius of the triangle whose sides are 3, 5, 6, is -...Let be a unit vector and is a nonzero vector not parallel to . The angles of the triangle, two of whose sides are repres...Internal bisector of ∠A of triangle ABC meets side BC at D. A line drawn through D perpendicular to AD intersects ...Let A (2, -3) and B(-2, 1) be vertices of a triangle ABC. If the centroid of this triangle moves on the line 2x + 3y = 1...