Published by:
CGP EDU Academic Team
Published on: August 13, 2026
If in a Δ Δ ABC, 
, then angle A
equals to
Text Solution
Verified by ExpertsThe correct answer is:
A
We have 
Multiplying
both sides by abc
⇒ ⇒ 2bc cosA + ac cosB + 2ab cosC = a 2 + b 2 (b 2 + c 2 – a 2 ) + 
⇒ ⇒ (c 2 + a 2 – b 2 ) = 2a 2 – 2b 2 ⇒ ⇒ b
2 + c 2 = a 2 ⇒ ⇒ ∠ ∠ A = 90 0
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