If A = 60o and B = 30o, find the value of (sin A.cos B + cos A.sin B)2 + (cos A.cos B − sin A.sin B)2.

If A = 60o and B = 30o, find the value of (sin A.cos B + cos A.sin B)2

1.	If A = 60o and B = 30o, find the value of (sin A.cos B + cos A.sin B)2 + (cos A.cos B − sin A.sin B)2.
Answer» If A = $60^{o}$ and B = $30^{o}$ , find the value of $(s i n A . c o s B + c o s A . s i n B)^{2}$ + $(c o s A . c o s B - s i n A . s i n B)^{2}$ .