Published by:
CGP EDU Academic Team
Published on: August 13, 2026
A triangle ABC is such that sin(2A + B) = 
. If A, B, C are in A.P. then the angle A, B, C are
respectively.
A
, 
, 
B
, 
, 
C
, 
, 
D
, 
, 
Text Solution
Verified by ExpertsThe correct answer is:
B
sin (2A + B) = 
⇒ 2A + B = 30 o or 150 o
A,B,C are in AP ⇒ B = 60 o
∴ 2A = – 30 o or 90 o ⇒ 2A = 90 o ⇒ A = 45 o
∴ C = 180 o – A – B = 75 o
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