1) sin 15° 2) cos 15° 3) sin 15° cos 15° 4) sin 15° cos 75° Answer: (3) sin 15° cos 15° Solution: sin 15° = sin(45° - 30°) = sin... View Article
1) cos 2θ 2) cos 3θ 3) sin 2θ 4) sin 3θ Answer: (1) cos 2θ Solution: cos 2(θ + Φ) + 4 cos(θ + Φ) sin θ sin Φ + 2 sin2Φ = cos 2(θ +... View Article
1) -√(1 + sin A) - √(1 - sin A) 2) -√(1 + sin A) + √(1 - sin A) 3) √(1 + sin A) - √(1 - sin A) 4) √(1 + sin A) + √(1 - sin A) Answer:... View Article
The following equation gives the efficiency of the Carnot engine: where T1 is the sink temperature, and T2 is the reservoir temperature. The... View Article
As the modulation index increases for frequency modulation (FM), the number of significant sidebands increases, but the sidebands’ total average... View Article
Some of the methods followed for measuring surface tension are as follows: Capillary Rise Method Stallagmometer method Wilhelmy plate or... View Article
If the two charges under consideration are of the same type (either positive or negative), then the electric potential between them is positive.... View Article
Electricity is the flow of electrons and electrons have mass, and therefore they have inertia. The individual masses of electrons are tiny, and... View Article
