Calculus
posted by Anna on .
what is the slope of the tangent to the graph of f(x)= ln [cos(x)] at x= pi/6 ???

slope?
f'(x)= 1/cosx * sinx
or tanx what is tan(PI/6) ? 
thank you!
posted by Anna on .
what is the slope of the tangent to the graph of f(x)= ln [cos(x)] at x= pi/6 ???
slope?
f'(x)= 1/cosx * sinx
or tanx what is tan(PI/6) ?
thank you!