Question

Friends please answer question number (ix)

Answer 1

Answer:

0

Step-by-step explanation:

given

sin 35 sin 55 - cos 35 cos 55

in the form of sinA sin B-cos A cos B

taking - as common -(cos A cos B-sin A sin B)

=-(cos(A+B))

= -(cos 35 cos 55- sin 35 sin 55)

= -(cos(35+55))

= -(cos(90))

= -(0)

= 0