MODULE 5: Lesson 4 ASSIGNMENT Lesson 4: Using Identities to Solve Equations The Module 5: Lesson 4 Assignment is worth 6 marks. The value of each question is stated in the left hand margin. (3 marks) 1. Determine the exact value of tan lfz\" using a sum, difference or double-angle identity. Expectations [J When using identities, it is a requirement to only use identities on your diploma given formula sheet [J Coterminal angles are not permitted as a solution Mathematics Assignment 30-1 2 Booklet 5 (3 marks) 2. Algebraically determine the general solution to the equation cos 2x = cos x . Express your answers in 7t radians. Expectations [J When using identities, it is a requirement to only use identities on your diploma given formula sheet [J If using inverse trigonometric functions in a solution you must include this step in your solution [J Students need to solve each factor individually e.g. (7x + )(x 6) = 0 7x+1=0 x6=0 1 X==76 [J Answer must be presented as an exact solution