Home FSc ICS Math 11th Ch 10 Trigonometric Identities Sum, Difference and Product of Sines and Cosines byAsad Hussain •June 10, 2017 0 FSc ICS Math 11th Ch 10 Trigonometric Identities Sum, Difference and Product of Sines and Cosines Written by: Asad Hussain & Ayesha Hussain Facebook Twitter