Объяснение:
[email protected]=-12/13
[email protected]=-√(1-144/169)=-5/13
[email protected]=cos²@-sin²@= 25/169-144/169=-119/169
[email protected]= [email protected]@= 2×-12/13×-5/13=100/169
Объяснение:
[email protected]=-12/13
[email protected]=-√(1-144/169)=-5/13
[email protected]=cos²@-sin²@= 25/169-144/169=-119/169
[email protected]= [email protected]@= 2×-12/13×-5/13=100/169