Published by:
CGP EDU Academic Team
Published on: August 12, 2026
In Δ ABC, if cos 
, then -
A
Area of triangle is 
ab
ab
B
Circumradius is equal to 
c
c
C
Area of triangle is 
bc
bc
D
Circumradius is equal to 
a
a
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(a, b)
cos 
= 
⇒ 
= 
⇒ b 2 + bc = 2s (s – a)
⇒ a 2 + b 2 = c 2
⇒ ∠π /2
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
In a Δ ABC, if P,Q,R divide sides AB, BC, CA respectively in k : 1. If , then k equals
In a triangle ABC, cos A cos B + sin A sin B sin C = 1, then the triangle is -
In a triangle ABC, =
If P is a point on the altitude AD of the triangle ABC such that ∠ PBD = , then AP is equal to -
In a Δ ABC, if a, b, c and A are given, then there are two Δ ’s with third sides c 1 and c 2 , then…
In a triangle ABC, tan = , tan = , then –