11:20

If m=cosθ-sinθ & n=cosθ+sinθ then show that sqrt(m/n)+sqrt(n/m)=2/{sqrt(1-tan^2(θ)}

02:00

A particle moves in a circle with constant speed of 15 m/s. The radius of the circle is 2 m. Deter..

05:50

Acar moves in a circle at the constant speed of 50m/s and completes one revolution in 40s. Deter..

05:57

A man throws a ball to maximum horizontal distance of 80 meters. Calculate the maximum height rea..

09:23

A velocity-time graph is shown in the adjoining figure.Determine:(i) initial speed of the car..

07:27

A car travels at a speed of 50 km/hr for 30 minutes at 30 km/hr for next 15 minutes and then 70 km..

06:36

A car moving along a straight road with a speed of 120 km/hr, is brought to rest by applying brake..

05:25

An aeroplane has a run of 500 m to take off from the runway. It starts from rest and moves with..

02:24

If three particles A, B and C are having velocities vA , vB and vC which of thefollowing formula..

01:57

For uniform acceleration in rectilinear motion which of the following is not correct?

01:00

The bob of a conical pendulum under goes..

02:09

For a particle having a uniform circular motion, which of the following is constant

01:27

An object thrown from a moving bus is on example of

01:01

An endoscope uses optic fiber to transmit high resolution images of internal organs without loss..

01:58

White light si dispersed by a prism. Inside the prism, compared ot the blue light, the red light..

00:44

The adjacent diagram shows the movable block of a block and tackle system with effort ni a conve..

01:17

For burning of coal in a thermoelectric station, the energy conversion taking place is:

01:32

The kinetic energy of a given body depends on the:

00:58

A moment of couple has a tendency to rotate the body in an anticlockwise direction. Then the mome..

01:21

After an examination, a teacher wants to know the marks obtained by maximum number of the students i

03:06

Which term of the A.P. -29, -26, -23, ..., 61 is 16?

07:14

XOYZ is a rectangle with vertices X(-3, 0), O(0, 0), Y(0, 4) and Z(x, y). Thelength of its each diag

04:59

In the given figure, tangents PA and PB to the circle centred at O, from point P are perpendicular t

05:47

A box contains cards numbered 6 to 55. A card is drawn at random from the box. The probability that

02:45

If value of each observation in a data is increased by 2, then median of the new data

04:53

The perimeters of two similar triangles ABC and PQR are 56 cm and 48 cm respectively. PQ/AB is equal

03:13

If α and β are zeroes of the polynomial 5x^2 + 3x-7, the value of (1/α) + (1/β) is

01:49

If sin θ = cos θ, (0° θ 90°), then value of (sec θ sin θ) is :

07:14

In the given figure ΔABC is shown. DE is parallel to BC. If AD = 5 cm, DB = 2.5 cm and BC = 12 cm,

03:20

If the HCF (2520, 6600) = 40 and LCM (2520, 6600) = 252 x k, then the value of k is

02:25

The quadratic equation x^2 + x + 1 = 0 has roots.

04:00

The common difference of an A.P. in which a15 - a11 = 48, is

05:51

Point P divides the line segment joining the points A(4, -5) and B(1, 2) in the ratio 5:2. Co-ordina

04:18

The value of k for which the system of equations 3x - y + 8 = 0 and 6x-ky+16= 0 has infinitely many

03:26

If α, β are the zeroes of the polynomial 6x²- 5x-4, then 1/α + 1/β is

01:15

For θ = 30°, the value of (2 sin θ cos θ) is :

03:10

One card is drawn at random from a well shuffled deck of 52 playing cards. The probability that it i

02:41

In an A.P. if the first term (a) = - 16 and the common difference (d)=-2, then the sum of first 10 t

02:53

nth term of an A.P. is 7n + 4. The common difference is :

04:09

If the sum and the product of zeroes of a quadratic polynomial are 2√3 and 3 respectively, then a qu

10:52

How many terms of the AP : 9, 17, 25, . . . must be taken to give a sum of 636?

02:39

Which of the following is not probability of an event ?(a) 0.89 (b) 52% (c) 1/13% (d) 1/ 0.89

15:19

200 logs are stacked in the following manner: 20 logs in the bottom row, 19 in the next row,18 in th

10:21

In a school, students thought of planting trees in and around the school to reduce air pollution. It

09:07

A sum of ₹700 is to be used to give seven cash prizes to students of a school for their overall acad

07:27

A contract on construction job specifies a penalty for delay of completion beyond acertain date as f

06:09

Find the sum of the odd numbers between 0 and 50.

12:25

Show that a1, a2,...,an,...form an AP where an is defined as below :(i) an = 3 + 4n (ii) an = 9 – 5n

04:27

Find the sum of the first 15 multiples of 8.

04:29

Find the sum of the first 40 positive integers divisible by 6.

08:16

If the sum of first 7 terms of an AP is 49 and that of 17 terms is 289, find the sum of first n term

05:03

Find the sum of first 51 terms of an AP whose second and third terms are 14 and 18 respectively

04:44

State Joules law of heating and write its mathematical expression.

04:39

State the law and write the formula connecting the electric currentflowing through a conductor..

15:42

As shown in the figure above A and B are two lamps. Lamp A is rated at 12 V, 24W. Lamp B is rated..

15:57

The above circuit is a part of an electrical device. Use the informationgiven in the question to..

24:47

The image below shows a banana plant which is growing with the help ofsuckers. These suckers..

06:54

Water is used by the leaves of the plants for photosynthesis but rather thanwatering the leaves..

13:35

In the given series of reactions, name the compounds X and Z.

09:38

Anirudh took two metal oxides; aluminium oxide and magnesium oxide as shown in the pictures given..