> I want to know why using radians work and while they are 'natural'.
If you convert (or start with) your angle measurements in radians then it turns out that:
d (sin x) / dx = cos x
d (cos x) / dx = -sin x
d (tan x) / dx = sec^2 x
etc.
You can work out the derivatives using degrees (we...
Hi,
You might find "How to Solve It" by George Polya helpful to pick up some ideas on how to go about working on problems. The one step he probably misses out is not not having "Don't Panic!" written in big friendly reassuring letters in his list like the cover of the Hitchhikers guide to the...