Lesson 14

UB Unit Ill Workbook 31 KEY QUESTIONS Lesson 14 Knowledge/Understanding [4 marks] Use the unit circle and the CAST rule to solve 2sinx + V3 =0 for OSx 5 2n . 2. Communication [3, 3 marks] a) How many solutions are possible for a linear trigonometric equation if the domain is the set of real numbers? Give an example to illustrate your answer. b) What is meant by 'reciprocal trigonometric equation'? 3. Application [6 marks] Solve 3sin20-5sin0-2=0 in the domain OSOS 2n MHF 4UB Unit III Workbook 32 4. Thinking/Inquiry/Problem Solving [4, 4, 6 marks] Solve the following equations in the domain 0 S x S 2n a) 4sinxcosx-1=0 6 b) sin xcos- + sin - cosx =- 6 JZ c) cos'x + 2sinx+1=0