Latest Posts

If X Cos Theta Y Cos Theta 2pi 3 Z Cos Theta 4pi 3 Then

1) 1 2) 2 3) 0 4) 3 cos θ Answer: (3) 0 Solution: Given, x cos θ = y... View Article

1) -6/65 2) 3/√130 3) 6/65 4) -3/√130 Answer: (4) -3/√130 Solution: Given, sin α + sin β = -21/65….(i)... View Article

1) [sin(n – 1)α]/ (cos x1 cos xn) 2) sin nα/(cos x1 cos xn) 3) sin(n – 1)α cos x1... View Article

1) 2/3 2) √3/4 3) 5/2√2 4) 5/2 Answer: (4) 5/2 Solution: Let S = 1 + 2(1 – cos... View Article

1) 2√(1 – k) 2) (1/2)√(1 + k) 3) 2√(1 + k) 4) None of these Answer: (3) 2 √(1... View Article

1) 0 2) 1 3) -1 4) 2 Answer: (2) 1 Solution: Given, sin x + sin2x = 1 sin... View Article

1) 1/4 2) 1/8 3) 1/16 4) None of these Answer: (2) 1/8 Solution: Given, k = sin π/18 sin... View Article

1) 1/(a + b)3 2) a3b3/(a + b)3 3) a2b2/(a + b)2 4) None of these Answer: (1) 1/(a +... View Article

1) (25/24)π 2) (19/24)π 3) (13/24)π 4) (11/24)π Answer: (2) (19/24)π Solution: tan(A – B) = 1 sec(A + B)... View Article

Alkali metals (elements belonging to group 1 of the modern periodic table) are known to be highly reactive and are,... View Article

The 2p orbital is known to have a total of one node. It can also be noted that the 1s... View Article

The term ‘rusting’ is often used synonymously with the term ‘corrosion’. However, it can be noted that the term ‘rusting’... View Article

The stiffness of a component is known to be a function of both the material and the geometry. At the... View Article

The chemical compound Bi2O5 (or bismuth pentoxide) is not known to be a pure compound. Moreover, it is known to... View Article

Plaster of Paris is known to be one of three primary types of plaster. Other notable types of plaster include... View Article

The values of the azimuthal quantum numbers for the s, p, d, and f subshells are 0, 1, 2, and... View Article

K is known to represent a vertical shift (the distance the graph has shifted from y = 0). For a... View Article

A buffer solution is a mixture of a weak acid and its conjugate base or a mixture of a weak... View Article

The latent heat of condensation is quite different from the latent heat of evaporation. The latent heat of condensation can... View Article

Being an organic acid, a weak acid is benzoic acid. Acid suggests that in aqueous solution it leaves proton. The... View Article