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In exponential form, sinh^2(x)=1/4(e^2x+e^-2x-2), cosh^2(x)=1/4(e^2x+e^-2x+2). Therefore cosh^2(x)-sinh^2(x)=1/4(2-(-2))=4/4=1, as required. 

Each part can be done separately, so x^2 becomes 2x, xy becomes dy/dx + y by product rule, y^2 becomes 2y(dy/dx) by chain rule, and 1 becomes 0. Hence the answer is 2x + y + (2y+1)dy/dx = 0, but the answe...

The Electoral College (EC) is a constitutional mechanism, better described as a process. It is used to elect the President and Vice-President. The EC was introduced as a compromise betwee...

Outline the four major reasons for the collapse of the German war effort, in a good essay each of these should take up about a paragraph each, with each paragraph following the PEA form (Point, Evidence, ...

En générale, j'essaie d'éteindre les lumieres quand je quitte ma chambre, parce-que cela aiderait á sauver d'énergie et donc c'est mieux pour le monde. Aussi je sensibilize les gens de ma ville aux proble...