More trig
posted by Poindexter .
Use the Quadratic Formula to solve the equation in the interval [0,2pi). Then use a graphing utility to approximate the angle x.
(1) 5/(tanx+secx)
(2) 4cos^2x4cosx1=0
Thank you.

1) is not an equation
2)
cosx= (4+sqrt(164*(4)(1))/8= you do it
check my thinking.