68. If A, B and C are the angles of a triangle and
then the triangle ABC is
(a) isosceles
(b) equilateral
(c) right angled isosceles
(d) none of these
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use the properties of determinants
after solving u will get
sinA=sinB
sinB=sinC
sinC=sinA
hence,the correct ans is isosceles triangle...
as AB=AC
for your convenience....
see the attachment
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kjmickey03:
thanks
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