1) x = 0 2) y = 0 3) x = y 4) x = nπ - π/4 + y, (n ∈ I) Answer: (4) x = nπ - π/4 + y, (n ∈ I) Solution: Given, cos y cos(π/2 - x)... View Article
1) 0 2) 2 sin 15° 3) cos 15° + sin 15° 4) sin 15° - cos 15° Answer: (1) 0 Solution: sin 15° + cos 105° = sin 15° + cos(90° + 15°)... View Article
In 1883, the Kjeldahl technique was invented by a brewer named Johann Kjeldahl. The procedure is based on the theory that strong acid contributes... View Article
Differentiation is a method of discovering a parameter that, with respect to another variable, produces the rate of change of one variable. There... View Article
Corrosion inhibitors are chemical compounds which, when applied to the atmosphere in which a metal is corroded in small quantities, minimise,... View Article
On the tiny charge of an isolated oil droplet, Millikan was able to calculate both the sum of electric force and the magnitude of the electric... View Article
A weak acid is an acid that in an aqueous solution or water dissociates partly into its ions. The conjugate base of a weak acid is a weak base,... View Article
Circles with a shared nucleus are concentric circles. An annulus is considered the area between two concentric circles of varying radii. By... View Article
In mathematics, a set of numbers is an arithmetic progression (AP) or an arithmetic sequence such that the difference between successive words is... View Article
To a point, all ionic compounds are soluble in water, although the degree of solubility varies. While some compounds almost entirely dissolve,... View Article
