Question

solve please
very difficult
trigonometry​

Answer 1

Answer:

All the best!

Hope it helps!

Answer 2

Answer:

Step-by-step explanation:

$cos A^{2} -cos B^{2} + sin A^{2} -sin B^{2}/ sin A*cos A - sin A*cos B +sin B*cos A - sin B*cos B$

=1-1/ sin A*cos A - sin A*cos B +sin B*cos A - sin B*cos B

=0/ sin A*cos A - sin A*cos B +sin B*cos A - sin B*cos B

=0

= option d