Just for the heck of it:

Ishuda

Elite Member
Joined
Jul 30, 2014
Messages
3,345
A(x) and B(x) are continuous, differentialable, and periodic with period 2\(\displaystyle \pi\) with the following properties:
A(0) = 0
B(0) = 1
A'(x) = B(x)
B'(x) = -A(x)
Derive properties of A and B relating to oddness, evenness, power series, differential equation, etc. What well know functions are A and B?
 
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