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

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Presentation on theme: "IB Revision Lesson 2 30 ° 45 °60° sin θ cos θ tan θ"— Presentation transcript:

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

2 IB Revision Lesson 2 mymaths - sin and cos

3 IB Revision Lesson 2 By sketching graphs, solve these equations for x where 0 x < 360 ° sin x = 0.463sin x = cos x = cos x = mymaths - tan

4 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 tansin 2 θ + cos 2 θ = 1 Double angle formulaeEquating brackets to 0 (sin x + 1)(4 sin x – 3) = 02sin 2 θ – 3cos 2 θ = 2

5 IB Revision Lesson 2

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7 Using GDC


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