MHF 4UB Unit III Workbook 24 KEY QUESTIONS Lesson 13 1. Knowledge/Understanding [6 marks] Simplify: sin x

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MHF 4UB Unit III Workbook 24 KEY QUESTIONS Lesson 13 1. Knowledge/Understanding [6 marks] Simplify: sin x a) tan x cos x b) sin 2x 1- cos 2x c) 4sin ~ cos- 2. Communication [6 marks] Show how you can use the compound and double angle formulas to find an expression for EITHER sin 30 OR cos30. MHF 4UB Unit III Workbook 25 3. Application [4, 4 marks] Prove the following identities: a) tanx + tanx sinxcosx b) tan 0 -1_ sin 0-cos2 0 sin O cose+ cos' 0 MHF 4UB Unit III Workbook 26 4. Application [8 marks] J7 If cos0 = , 0

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MHF 4UB Unit III Workbook 24 KEY QUESTIONS Lesson 13 1. Knowledge/Understanding [6 marks] Simplify: sin x

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