Published by:
CGP EDU Academic Team
Published on: August 13, 2026
With the usual notation, in Δ ABC, if ∠ A + ∠ B = 120°, a = 
+ 1 and b = 
–1, then the ratio ∠ A : ∠ B, is:
Text Solution
Verified by ExpertsThe correct answer is:
B
Sol. 
= 
= 
– 
= 
cotx
= 
cotx
cotx = 
+ 2
tanx = 2 – 
x = 15º
120 – x = 105 °
∴ 
= 
(7 : 1)
──────────────────────────────────────────────────────────────────────────────────────────
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
The lines p(p 2 + 1) x – y + q = 0 and (p 2 + 1) 2 x + (p 2 + 1) y + 2q = 0 are perpendicular to a …
Three distinct points A, B and C are given in the 2-dimensional coordinate plane such that the rati…
The line L given by = 1 passes through the point (13, 32). The line K is parallel to L and has the…
The lines x + y = | a | and ax – y = 1 intersect each other in the first quadrant. Then the set of …
If A(2, –3) and B(–2, 1) are two vertices of a triangle and third vertex moves on the line 2x + 3y …
If the line 2x + y = k passes through the point which divides the line segment joining the points (…