Equazioni e disequazioni goniometriche
Equazioni e disequazioni goniometriche
Equazioni e disequazioni goniometriche
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Esercizi.<br />
1. senx>2;<br />
2. cosx>-2;<br />
3. tanx>-1;<br />
4. 2senx-1 0;<br />
7. 2 cos(<br />
3x<br />
) < 3;<br />
8.<br />
x<br />
2 sen + 1 > 0;<br />
2<br />
9.<br />
⎛ π ⎞<br />
tan ⎜ x + ⎟ ><br />
⎝ 4 ⎠<br />
3;<br />
10.<br />
2<br />
2cos<br />
x < 1;<br />
11.<br />
2<br />
2sen<br />
x − senx ≥ 0;<br />
12.<br />
senx<br />
≤ 0;<br />
cos x + 1<br />
13.<br />
2<br />
2cos<br />
x + 3cos<br />
x + 1 < 0;<br />
14. sen(2x)-cosx ;<br />
2<br />
17. tan 2 tan 3;<br />
2<br />
x + x <<br />
18. sen2x+cos2x 0;<br />
2<br />
20. 2<br />
2<br />
3 cos x − sen2x<br />
< 3;<br />
21. 3senx + cos x ≥ 1;<br />
2 x<br />
22. sen + cos x + 1 > 0;<br />
2<br />
2cos<br />
x − 3<br />
23. ≥ 0;<br />
senx<br />
24. cos x<br />
− 3senx<br />
< 0.<br />
8
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