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Using your scientific calculator

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Help videos have been added to National 5 Maths!

We have added some videos to the National 5 Maths course materials to help you solve quadratic and trig equations using your scientific calculator.

In Topic 19 the videos show you how to solve quadratic equations using the quadratic formula when b is negative and when b is positive.
19 Solving quadratic equations > 19.3 Solving quadratic equations using the quadratic formula

In Topic 20 the videos show you how to find the unknown side using the Cosine rule and how to find the unknown angle using the Cosine rule.
20 Trigonometric rules > 20.3 Using the Cosine rule