(a) (b) Prove that: cos 39 sin 29 3034951319 = cos ZHSis (8 marks) Using the relations: sin(A + B) = sinAcosB + cosAsinB cos(A + B) = cosAcosB sin AsinB, (i) Obtain an expression for tant + B) in terms of ram! and cans. (7 marks) (ii) Without using mathematical tables or calculator, show that the sum of the three acute angles whose tangents respectively are E f and i - 1'! Is . .1, {15 marks}