1
IIT-JEE 1996
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+1
-0
In a triangle $$ABC$$, $$a:b:c=4:5:6$$. The ratio of the radius of the circumcircle to that of the incircle is ............
2
IIT-JEE 1994
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+2
-0
In a triangle $$ABC$$, $$AD$$ is the altitude from $$A$$. Given $$b>c$$, $$\angle C = {23^ \circ }$$ and $$AD = {{abc} \over {{b^2} - {c^2}}}$$ then $$\angle B = $$.................
3
IIT-JEE 1994
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+2
-0
A circle is inscribed in an equilateral triangle of side $$a$$. The area of any square inscribed in this circle is ..............
4
IIT-JEE 1993
Fill in the Blanks
+2
-0
If in a triangle $$ABC$$, $${{2\cos A} \over a} + {{\cos B} \over b} + {{2\cos C} \over c} = {a \over {bc}} + {b \over {ca}},$$ then the value of the angle $$A$$ is .................... degrees.
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