The university of Berkeley is a very prestige college in California
Answer: Percy Spencer
Percy Spencer, was an American engineer. He was the inventor of the microwave oven in 1945, serving the Raytheon company.
The calorific effect of microwaves was discovered by the American Percy Spencer. While experimenting with radars and microwaves, he noticed that the candy bar in his pocket had almost melted. He sought the explanation of this fact, the grain of corn under the effect of these waves and within seconds they were transformed into popcorn. The microwaves had agitated the water molecules contained in the corn kernels, rubbed them against each other, and warmed them.
Two trig identities are of interest here:
... sin(x)² + cos(x)² = 1
... csc(x) = 1/sin(x)
Using the first one, you can subtract cos(x)², the take the square root to find
... sin(x) = ±√(1 - cos(x)²)
Using that in the second one, you have
... csc(x) = ±1/√(1 - cos(x)²) . . . . . . . . . . . . . matches the 3rd choice
<span>a)groups of militant university and high-school students formed into paramilitary units to help Mao combat his enemies
'learn revolution by making revolution'</span>
