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Show that Sec2A - Tan2A = (CosA-SinA)/(CosA+SinA)

Sec2A - Tan2A Definition of Sec and Tan = 1/Cos2A - Sin2A/Cos2A Combining Fractions = (1 - Sin2A) / (Cos2A) Apply Double Angle Formula = (1 - 2SinACosA) / (Cos 2 A - Sin 2 A) Make use of 1 = Cos 2 x + Sin 2 ...
JC
Answered by James C. • Maths tutor
38177 Views

using an integrating factor, find the general solution of the differential equation dy/dx +y(tanx)=tan^3(x)sec(x)

This is a first order differential equation, but initially it is not solvable as both the X&Y's can't be separated from eachother directly. An integrating factor is a specific value that when multiplied ...
TR
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What are the main differences between prokaryotic and eukaryotic cells?

I would say the main difference here is that eukaryotic cells (e.g. animal cells) have a nucleus and membrane-bound organelles, whereas prokaryotic cells (bacteria and archaea) have no nucleus and no membran...
SP
Answered by Sophie P. • Biology tutor
15725 Views

What are 'shareholder ratios' and how do you work them out?

Shareholder ratios are measures used to assess the level of return received by the shareholders of a company. There are two main meaures: dividend per share and divident yield. Dividend per share = a ratio t...
FD
24815 Views

What is Plato's 'Theory of Forms'?

Plato's Theory of Forms is an epistemological response to the nature of reality. This means Plato attempts to answer the question 'what is true reality?'. The idea is that every object in the world we see, i...
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