David Delgado - DP Maths Teacher | Maths Resources · 2020. 1. 13. · = 2 cos b) 1 + tg 250 o 55...
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David Delgado - DP Maths Teacher | Maths Resources · 2020. 1. 13. · = 2 cos b) 1 + tg 250 o 55 a) I + sin x = sin 90' + sin x = 2 sin cos sin 600 — — sin 450 - sin 60 e —