Published by:
CGP EDU Academic Team
Published on: August 14, 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 = 105º
∴ 
= 
(7 : 1)
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