Quandaries
and Queries 

I am a parent trying to understand higher level of maths and would be very grateful if you could help with differentiating the following functions, identifying general rules of calculus: a) f(x)=e^{2x}In(cos(8x)) b) f(x)=secx/SQRT(x^{4}+1) 

Hi, In the first problem you have a product of an exponential function and a log function. The power of the exponential is 2^{x} and the derivative of 2^{x} is 2^{x} ln(2) so
For the second problem I would use the quotient rule so the numerator of the derivative is
and the denominator is ( x^{4}+1) Penny 

