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IB Revision Lesson 2 30° 45° 60° sin θ cos θ tan θ

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IB Revision Lesson 2 mymaths - sin and cos

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IB Revision Lesson 2 By sketching graphs, solve these equations for x where 0 ≤ x < 360° sin x = sin x = cos x = cos x = mymaths - tan

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IB Revision Lesson 2 We can solve equations of the form sin θ = k. Now we will bring in some identities to solve more complicated things. Dividing by cos to get tan sin2θ + cos2θ = 1 Double angle formulae Equating brackets to 0 (sin x + 1)(4 sin x – 3) = 0 2sin2θ – 3cos2θ = 2

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IB Revision Lesson 2

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IB Revision Lesson 2

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IB Revision Lesson 2 Using GDC

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Aim: How do we solve trig equations using reciprocal or double angle identities? Do Now: 1. Rewrite in terms of 2. Use double angle formula to rewrite.

Aim: How do we solve trig equations using reciprocal or double angle identities? Do Now: 1. Rewrite in terms of 2. Use double angle formula to rewrite.

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