If B be the exterior angle of a regular polygon of n - sides and A is any constant then `cos A + cos(A+ B)+cos(A+2B)....n` terms is equal to

If phi be the exterior angle of a regular polygon of n sides and theta is any constant, then prove that costheta+cos(theta+phi)+cos(theta+2phi)+…+to n term =0

If the difference between an exterior angle of a regular polygon of 'n' sides and an exterior angle of another regular polygon of '(n+1)' sides is equal to 5^(@) , find the value of 'n'.

Find the measure of each exterior angle of a regular polygon of(i) 9 sides (ii) 15 sides

If r is the radius of inscribed circle of a regular polygon of n-sides ,then r is equal to

If the difference between an interior angle of a regular polygon of (n + 1) sides and an interior angle of a regular polygon of n sides is 4^(@) , find the value of n. Also, state the difference between their exterior angles.

The exterior angle of a regular polygon is one-third of its interior angle. How many sides has the polygon?

The exterior angle of a regular polygon is one-third of its interior angle. Find the number of sides in the polygon.

In any DeltaABC , a cos A +b cos B + c cos C =

The ratio between the interior angle and the exterior angle of a regular polygon is 2: 1. Find : (i) each exterior angle of the polygon. (ii) number of sides in the polygon.

The ratio of the area of a regular polygon of n sides inscribed in a circle to that of the polygon of same number of sides circumscribing the same is 3:4. Then the value of n is 6 (b) 4 (c) 8 (d) 12