Express each of that as the sum or difference of cosines and sines: `cos 75^@Cos 15^0`

Express each of that as the sum or difference of cosines and sines: 5 sin theta.sin 8theta

Express each of the following as the sum or difference of sines and cosines: \ 2cos7thetacos3theta

Express each of the following as the sum or difference of sines and cosines: \ 2cos3thetasin2theta

Express each of the following as the sum or difference of sines and cosines: \ 2sin4thetasin3theta

Express each of the following as the sum or difference of sines and cosines: \ 2sin4thetasin3theta

Express each of the products into sums or difference of sines and cosines : 2cos 9theta. Cos 4theta

Express each of the following as the sum or difference of sines and cosines: 2sin3thetacostheta

Convert each of the following products into the sum or difference of sines and cosines: cos\ 75^0cos15^0

Express each of the following as a sum or difference of sine and cosine. i) 2sin7A cos3A , ii) 2cos5A sin3A , iii) 2cos8A cos5A , iv) 2sin6Asin4A

Express each of the following as a sum of difference of sine and cosine. i) 2sin2A cosA ii) 2cos5Asin2A iii) 2cos4AcosA iv) 2sin3AsinA