a) 3 1 You are given sin 60 , cos 60 = and sin 45 =...

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a) √3 1 You are given sin 60° , cos 60° = and sin 45° = cos 45°: = 2 2 Use these results to find sin 15°, giving your answer in surd form. You must show all of your working. b) Solve 3 cos 20+ cos 0 = -1 (0° ≤ 0≤360°) 1 a) √3 1 You are given sin 60° , cos 60° = and sin 45° = cos 45°: = 2 2 Use these results to find sin 15°, giving your answer in surd form. You must show all of your working. b) Solve 3 cos 20+ cos 0 = -1 (0° ≤ 0≤360°) 1

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Gruen Sinbo 45602 2 2 5in15 7 and sinas cos 45 2 By using sin AB we can evaluate sin15 flore ... View the full answer