x2 - 2xy cosec ϴ + y2 = 0 or, x2 + x(-2y cosec ϴ) + y2 = 0 or, comparing with ax2 + bx + c = 0, a = 1 b = (-2y cosec ϴ) c = y2 So, x = (-b +- √(b2 - 4ac))/2a or, x = (2ysecϴ  .....

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Solution: Here, f (2x + 3) = 6x + 4 or, f(x) = 6 (2x + 3) + 4 or, f (x) = 12x + 18 + 4 or, f (x) = y = 12x +22 Now, interchanging the value of 'x' and 'y' we get, x = 12y  + 22 x - 22 = 12y (x - 22) /12 = y Inverse of .....

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3) The element "C" belongs to p-block. The element "C" belongs to period 2. Here, The element "C" is Oxygen. Now, look at this modern periodic .....

Answer: Transformer is an electrical device that transfers electrical energry between two or more circuits through electromagnetic induction. Solution Power of 20 electric bulb = 20 X100 watt              .....

Solution: Mean = Sum of all items / No. of items or, 18 = [ P + P + 3 + P + 6+  P + 9 + P + 12 + P + 15 ] /6 or, 18 x 6  = 45 + 6 P  or, 6P = 108 - 45 or, 6P = 63 P = 63 / 6 = 21/2 Hence, P = 21/2         .....

Given: Sum of given items = 6 + 10 + P + 12 = 28 + P Total given items = 4 Mean = 18 We know, Mean = sum of given items/ total given items or, 18 = (28 + P)/4 or, 18 × 4 = 28 + P or, 72 = 28 + P or, P = 72 - 28 Therefore, P = .....

Solution, Here, No. of items = 5 We know,  Mean = Sum of all items / No. of items or, 13 = [ P + P + 2 + P + 4 + P + 6 + P + 8 ] / 5 or, 13 x 5  = 20 + 5 P  or, 65 = 20 + 5P or, 65 - 20 = 5P or, 5P = 45 or, P =45 / 5 or, P .....

Solution, Here, No. of items = 5 Mean = 25 We know,  Mean = Sum of all items / No. of items or, 25 = [ 20+ 22 + P +28 + 30 ] / 5 or, 25 x 5  = 100+ P  Or, 125 = 100 + P or, P = 125 - 100 or, P = 25 Hence, P = .....

We know,  Mean = Sum of all items / No. of items or, 10 = [ 6+ 8 +9 + P + 13 ] / 5 or, 10 x 5 = 36 + P  or, P = 50 - 36 Hence, P = .....

Solution: Here, Mean = 18 We know,  Mean = Sum of all items / No. of items or, 18 = [ 6+ 10 + P + 12 ] / 4 or, 18 x 4 = 28 + P  or, P = 72 - 28 Hence, P = .....

Makai Parva is one of the historical events in Nepal. In 1977 BS, Subba Krishna Lal wrote a book titled Makai Ko Kheti.  He was accused of printing unacceptable words. In his book he stated, “We prefer the foreign dog to the native, .....

Look at the picture of a bird above. The bird in the picture is Spinny Babbler. The spiny babbler is a species of bird in the family Leiothrichidae. It is found only in the middle hills of Nepal. In Nepali, it is called 'काँडे .....

In the beginning of eighth century B.C., ancient Rome grew from a small town on central Italy’s river into an empire. At its peak, it covered most of continental Europe, Britain, much of western Asia, northern Africa and the .....

विवेचनात्मक उत्तर  वैशाख' कविताका आधारमा कविलाई सौन्दर्यप्रेमी र आशावादी कविका रूपमा .....

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The Parva of 1938 BS was about the plan to get the Rana Rule by the king. It was a kind of conflict in which 20 people were killed. The Parva of 1942 BS was a kind of conspiracy among Rana family. It was a kind of misunderstanding among Rana .....

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In this region, the individual atoms have so little chance of collision that they essentially travel in free orbits or trajectories, at speed imparted by the last collision. Hence, this layer is also called fringe .....

We can also say that nascent oxygen is a single oxygen atom which has not bonded to another oxygen .....

Malla dynasty started in Nepal after the fall of Lichchhavis. The early Malla rule started with Ari Malla in the 12th century. Jaya Prakash Malla (1792 - 1825 BS) was the last Malla King of Kathmandu. The Malla dynasty was dissolved when Prithivi .....

Here, (512/729)1/3 = 512/729  x 1/3 = (512 x 1)/(729 x 3 ) = 512 / .....

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But if it is connected in parallel combination then  all the current won't flow through it and it can not give the accurate reading of the .....

Second part: Given, mass of steel (m) = 5 kg Specific heat capacity of steel (S) = 1447 J/Kg0C Change in temperature (dt) = ? According to the question, Heat supplied to steel = Heat supplied to silver or, Q = 17550 J or, mSdt = .....

- Europeans learned algebra and number from the Arabs and Arithmetic and Geometry from the Greeks. - Gregory issued the scientific calendar. - Besides, drastic changes were made in the field of Physics, Chemistry and medicine. - The Portuguese .....

Solution: Given, Amount of heat energy (Q) = 4.2 ⨯ 103 kJ                                              = 4.2 ⨯ .....

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This means that once the solar radiation reached to the atmosphere of the Venus, it cannot escape away from the atmosphere of the Venus. Thus an oven is created and has become the hottest. This is why Venus has no .....

All of the inner planets are small, relative to the outer planets. All of the inner planets are solid, dense, rocky planets. The inner planets either do not have moons or have just one (Earth) or two (Mars). None of the inner planets has .....

Here, AB is the height of the tower. BC is the shadow when the Sun's altitude is 60o. BD is the shadow when the Sun's altitude is 45o. Now,  Look at triangle ABC, we have, tan 60 = h / x  or, h = √3x ........equation .....

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Here, r = 7 cm. Area(A) = πr2 = 22/7 x 72 = 154 cm2 Hence, Area(A) = 154 .....

Asia is the largest .....

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You might have learnt about law of reflection of light. Consider a light-ray incident on a plane mirror, as shown in the figure. The law of reflection states that the incident ray, the reflected ray, and the normal to the surface of the mirror .....

Solution Selling Price of 1 KG fruits(SP)= Rs .60 Selling Price of 40 KG fruits(SP)= 60 x 40 = Rs.2400 Profit amount(P)=Rs.600 Cost Price (CP) =? Profit percent(P%)=? Now, we know Profit= SP-CP    or,    600   = .....

A negative sentence is a sentence that states  something is opposite of the affirmative. We make  negative sentences by adding the word 'not' after the auxiliary, or helping, verb. An example of an .....

Electromagnets are soft metal cores made into a magnet by the passage of electric current through a coil surrounding .....

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The reason behind this are as follows: - The agriculture in Nepal is only subsistence. - The manpower involved in this sector are not equipped with the knowledge, skills and    advanced technologies for better production. - The .....

Therefore, the government should take the right steps to attract the educated ones in agriculture. The government needs to take the following steps: - The agro-loan should be provided to the educated people. - The agricultural knowledge, training .....

The reasons behind this are mentioned below: - The agriculture in Nepal is only subsistence. - The manpower involved in this sector are not equipped with the knowledge, skills and techniques for   the better production. - The .....

The reasons behind this are as follows: - The decades of political instability in the country has directly affected the development of irrigation for    agriculture.  - The developed irrigation facility is not accessible to all the .....

- The irrigation facility for the agricultural activities should be managed. - The government should work with the long-term plans and policies for the reformation of agriculture in Nepal. - The agro-loans, incentives, insurance of the crops, .....

Similarly, the agricultural production at Himalayan and Hilly region has not been supplied well to the Terai due to the lack of proper transportation system. The available transportation system such as road and air is not sufficient and .....

Solution Let 'a' is added to 4x-5 to get 7x+2, then 4x-5 + a = 7x + 2 a = 7x+2 -4x + 5     = 7x-4x +2 + 5      =  3x + 7 3x + 7 should be added  to 4x-5 to get 7x + .....

The applications of kol for oil seeds are as follows: 1. Crushing of oil seeds 2.Extraction of .....