Consider the trigonometric function on the interval (0,2pi). Find the open intervals on which the function is increasing or decreasing.
My first questions is
2 sin(x) cos(x)+cos(x)
cos(x) 2sin(x)+1=0 (factor)
x=7pi/6,11pi/6 Did I do this correctly
My second question is
How would I solve this one I seem to be getting an incorrect answer