1.
The solution of equation lies in the interval
2.
The circular wire of diameter 10 cm is cut and placed along the circumference of a circle of diameter 1 m. The angle subtended by the wire at the center of the circle is equal to
3.
If , then is equal to
4.
5.
The equation has
6.
In a triangle
7.
is equal to
8.
If and , then is equal to
9.
If in a then the value of is
10.
If are respectively the perpendiculars from the vertices of a triangle to the opposite sides, then  is equal to