equation trig
posted by VesaN .
cosxsinx<1/2

equation trig 
bobpursley
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. 
equation trig 
VesaN
thnx
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