equazioni-goniometriche
equazioni-goniometriche
equazioni-goniometriche
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
�� �������� �� ���������<br />
����� ������� �� ������������ � �� �������������<br />
sin(2α) = 2 sin α cos α<br />
cos(2α) = cos2 α − sin 2 α = 1 − 2 sin 2 α = 2 cos2 α − 1<br />
2 tan α<br />
tan(2α) = 1−tan2 α<br />
sin(3α) = 3 sin α − 4 sin 3 α<br />
cos(3α) = 4 cos3 α − 3 cos α<br />
tan(3α) = 3 tan α−tan3 α<br />
1−3 tan2 α<br />
����� ������� �� ���������<br />
sin( α<br />
2<br />
cos( α<br />
2<br />
) = ±<br />
) = ±<br />
tan( α<br />
2 ) = ±<br />
�<br />
1−cos α<br />
2<br />
�<br />
1+cos α<br />
2<br />
�<br />
1−cos α<br />
1+cos α<br />
sin α 1−cos α<br />
= 1+cos α = sin α<br />
����� ������� ������������<br />
t def<br />
= tan α<br />
2 −→<br />
⎧<br />
⎨<br />
⎩<br />
sin α = 2t<br />
1+t 2<br />
cos α = 1−t2<br />
1+t 2<br />
tan α = 2t<br />
1−t 2<br />
����� ������� �� ������������<br />
sin p + sin q = 2 sin p+q<br />
2<br />
cos p−q<br />
2<br />
sin p − sin q = 2 cos p+q<br />
2 sin p−q<br />
2<br />
cos p + cos q = 2 cos p+q<br />
2<br />
cos p−q<br />
2<br />
cos p − cos q = −2 sin p+q<br />
2 sin p−q<br />
2<br />
����� ������� �� ������<br />
cos p · sin q = 1<br />
2 [sin(p + q) − sin(q − p)]<br />
sin p · sin q = 1<br />
2 [sin(p − q) − cos(p + q)]<br />
cos p · cos q = 1<br />
2 [cos(p + q) + cos(p − q)]<br />
������ ������� �� �����������<br />
☛ ������� ��� � ������<br />
������ ����� ����<br />
☛ ������� ��� � ������