Lesson#7 Question No.5 ( ii & iii ) Q5: Prove that: (iii): sin 10° sin 30° sin 50° sin 70°=1/16 (ii): sin π/9 sin 2π/9 sin π/3 sin 4π/9=3/16 This is end of Ex. 10.4 , now practice yourself. Thanks. Trigonometric Identities Chapter No 10 Exercise No 10.4 Mathematics part 1
