1
IIT-JEE 1987
Fill in the Blanks
+2
-0
A polygon of nine sides, each of length $$2$$, is inscribed in a circle. The radius of the circle is .................
2
IIT-JEE 1985
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+2
-0
The set of all real numbers $$a$$ such that $${a^2} + 2a,2a + 3$$ and $${a^2} + 3a + 8$$ are the sides of a triangle is ...........
3
IIT-JEE 1985
Fill in the Blanks
+2
-0
In a triangle $$ABC$$, if cot $$A$$, cot $$B$$, cot $$C$$ are in A.P., then $${a^2},{b^2},{c^2}$$, are in ............... progression.
4
IIT-JEE 1980
Fill in the Blanks
+2
-0
$$ABC$$ is a triangle with $$\angle B$$ greater than $$\angle C.\,D$$ and $$E$$ are points on $$BC$$ such that $$AD$$ is perpendicular to $$BC$$ and $$AE$$ is the bisector of angle $$A$$. Complete the relation $$\angle DAE = {1 \over 2}\left[ {\left( {} \right) - \angle C} \right]$$\$
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