.Question 6 0/1 pt 0 3 99 0 Details Use the product-to-sum formula to find the exact value: If 2sin 52.5 sin 97.50 V2 + VA then 2 A = Question Help: Message instructor Submit Question Question 7 0/1 pt 9 3 99 0 Details Use the product-to-sum formula to find the exact value: If cos 37.5 sin 7.50 = VA - B -, then A = B = Question Help: Message instructor Submit Question . Question 8 0/1 pt 0 3 99 0 Details Use the sum-to-product formula to find the exact value: If cos 255 - cos 195 0 VA 2 , then A = Question Help: Message instructor Submit Question Question 9 0/1 pt 9 3 99 0 Details Write the sum as a product: cos(20.3a) - cos(6.9a) = Question Help: Video Message instructor Submit