equation trig
posted by VesaN .
cosxsinx<1/2

square both sides
cos^2 2sin*cos + sin^2<1/4
1sin(2x)<1/4
sin(2x)<3/4
2x>131deg
x>65.5 deg
2x<311
x<155 check that with a graph. 
thnx
posted by VesaN .
cosxsinx<1/2
square both sides
cos^2 2sin*cos + sin^2<1/4
1sin(2x)<1/4
sin(2x)<3/4
2x>131deg
x>65.5 deg
2x<311
x<155 check that with a graph.
thnx