If `theta` is the internal angle of `n` sided regular polygon, then `sintheta` is equal to:

The interior angle of a n sided regular polygon is 48^(@) more than the interior angle of a regular hexagon. Find n.

Measure of an angle of the regular polygon having ten sides is .........radian.

Five charges, q each are placed at the corners of a regular pentagon of side 'a' as in figure: (a) (i) What will be the electric field at O, the centre of the pentagon ? (ii) What will be the electric field at O if the charge from one of the corners (say A) is removed ? (iii) What will be the electric field at O if the charge q at A is replaced by -q ? (b) How would your answer to (a) be affected if pentagon is replaced by n-sided regular polygon with charge q at each of its corners ?

Equilateral triangles are drawn on the three sides of a right angled triangle. Show that the area of the triangle on the hypotenuse is equal to the sum of the areas of triangles on the other two sides.

n' number of particles are located at the verticles of a regular polygon of n sides having the edge length 'a'. They all start moving simultaneously with equal constant speed 'v' heading towards each other all the time. How long will the particles take to collide?

Let T_n be the number of all possible triangles formed by joining vertices of an n-sided regular polygon. If T_(n+1)-T_n=""10 , then the value of n is (1) 5 (2) 10 (3) 8 (4) 7

(n-1) equal point masses each of mass m are placed at the vertices of a regular n-polygon. The vacant vertex has a position vector a with respect to the centre of the polygon. Find the position vector of centre of mass.

If sintheta+cosectheta=2 , then sin^(2)theta+cosec^(2)theta is equal to

The sum of interior angles of a triangle is 180^(@) . Show that the sum of the interior angles of polygons with 3,4,5,6…..sides form an arithmetic progression. Find the sum of the interior angles for a 21 sided polygon.