I started with the different quotient formula:Find the IRoC at the point (90 degrees, 5) on f(x) = 5sin(x)
IRoC = ( f(x+h) - f(x) ) / h , h-->0
=( 5 sin (90 +h) - 5 ) /h
= (5 sin h) / h
What do I do next?? I don't think I can factor out the h, even if I did what would sin take as an argument?
Thank you for the help.
Edit: Also, how would you apply the same formula with an exponential function like y = 100(0.85)^x , on x = 0 ??