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The first thing to remember is that the tangent to the curve at a given point has the same gradient as the curve at that point. Let's consider the general case y=f(x) at a point c=(x1,y1). Step 1:We have to ...

Firstly, note that cos^2(x)+5sin^2(x)= cos^2(x) +sin^2(x) +4sin^2(x). By trignoemtric identies, cos^2(x)+sin^2(x)=1 and so we can just integrate 1+4sin^2(x) since this is equal to cos^2(x)+5sin^2(x). Again, ...

A strong A-Level music essay should mainly contain the identification and analysis of some of the key musical features within the given piece, and should also provide some information about the musical perio...

Acids , by definition, are proton donors, so will donate a H + ion to a base. Examples of acids may be HCl or ethanoic/acetic acid (a.k.a. vinegar). Bases , by contrast, are proton acceptors, so will accept ...

Using the knowledge of a 2 = b 2 + c 2 - 2bcCos(A) Rearrange to aquire Cos(A) = (b 2 + c 2 - a 2 )/2bc Then input the values to obtain the angles of 42, 69, 69.