For the following questions answer them individually
If the ratio of the sum of the first 3 terms of a geometric progression to the sum of the first 6 terms is 8:35, then the common ratio of that geometric progression is
The radius of the circle is 21 cms. The angle subtended by an arc of the circle at the centre is $$60^{\circ}$$. The length of its arc is
$$4(\sin^{4} 30^{\circ} + \cos^{4} 60^{\circ}) - 3 (\cos^{2} 45^{\circ} - \sin^{2} 90^{\circ}) =$$
If the angles of a triangle ABC are in arithmetic progression then
$$\frac{\cos C - \cos A}{\sin A - \sin C}$$ =
The angle of elevation of top of a mountain cliff from a point 200 m from its foot is $$45^{\circ}$$. The height of the cliff (in meters) is
The area of an equilateral triangle is $$256\sqrt{3}$$ sq. cm., then the perimeter of that triangle is
If the perimeter of a right angled triangle is 60 cm and its hypotenuse is 26 cm. then the area of the triangle in $$cm^{2}$$, is
$$ABCD$$ is a parallelogram in which $$AB = 2x + 5; CD = y + 1;Â AD = y + 5$$ and $$BC= 3x - 4$$. Then the lengths of the sides of the $$ABCD$$ are