You can simplify the equation by using the cos(2x) trig identity Comment 4 x cos^2(x) + pi/2 - 2x - sin(2x) = 0 can be simplified a little using cos(2x) = 2 cos^2(x) - 1 You get: 2 x cos(2x) + pi/2 - sin(2x) = 0 or replacing variables (y = 2x): y cos(y) + pi/2 - sin(y) = 0 Reply
4 x cos^2(x) + pi/2 - 2x - sin(2x) = 0
can be simplified a little using cos(2x) = 2 cos^2(x) - 1
You get:
2 x cos(2x) + pi/2 - sin(2x) = 0
or replacing variables (y = 2x):
y cos(y) + pi/2 - sin(y) = 0