Published by:
CGP EDU Academic Team
Published on: August 14, 2026
An isosceles triangle ABC is inscribed in a circle x 2 + y 2 = a 2 with the vertex A at (a, 0) the base angle B and C each equal to 75 0 , then co-ordinates of an end point of the base are -
A
B
C
D
Text Solution
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(b, d)
∠ B = ∠ C = 75 0 ∠ BAC = 30 0 ⇒ ∠ BOC = 60 0
Δ OBC is equilateral BC = OB = a
M is middle point of BC then OM = 
= 
BC is ⊥ r to MO, the x-axis Equation of BC is x = – 
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