Over a million students use our free study notes to help them with their homework
(sinx)^2 (similarly to (cosx)^2) cannot be integrated in this form. There is a standard method to get past this though, which makes use of the cos double angle formula:cos(2x) = (cosx)^2 - (sinx)^2 ...
ax2+bx+c=0 : basic quadratic equation
a(x2 + bx/a) + c=0
a((x+b/2a)2 - Answered by Jaiveer D. • Maths tutor5463 Views
The first part is relatively simple. If we write tan(3x) as tan(2x+x) we can use addition formulae to give:
tan(2x+x)= (tan(2x)+tan(x))/(1-tan(2x)tan(x))
tan(2x) = 2tan(x)/...
This is a basic example of a very important result: the chain rule. The difficulty of this sort of example is that we have a "function of a function". That is, we have the function '4-x' and ...
For this question the chain rule should be used, the chain rule is that dy/du*du/dx=dy/dx.
If we say u=(x2+2x) and therefore y=eu
Then du/dx=2x+2 and d...
←
621
622
623
624
625
→
Internet Safety
Payment Security
Cyber
Essentials
