In this video I will show you how to solve a trigonometric equation using the double angle for cosine. When applying the double angle of cosine we are given a quadratic equation where we will now need ...

👉 Learn how to solve trigonometric equations. There are various methods that can be used to evaluate trigonometric equations ...

Practise solving trigonometric equations in degrees or radians using CAST and its period to find other solutions within the range, including multiple or compound angles and the wave function.

Solve trigonometric equations in Higher Maths using the double angle formulae, wave function, addition formulae and trig identities.