Express each as a product
sin `75^(@) - sin 35^(@)`

Express each as a product sin 50^(@) + sin 40^(@)

Express each as a product cos 35^(@) - cos 75^(@)

sin 75^(@) + sin 15^(@) =

Express each of the folloiwng as a product (i) sin 75^(@)-sin 35^(@) (ii) cos 65^(@)+cos 15^(@) (iii) sin 50^(@)+sin 40^(@) (iv) cos 35^(@)-cos 75^(@) .

Express as sum or difference: 4 sin20^(@) sin 35^(@)

Express the following sum or difference as a product (i) sin 50^@+sin 20^(@)

Express each of that as product of sines and cosines : sin 4theta + sin 3theta