# StudySquare

# Edexcel A-level Maths Trigonometric equations

This page covers the following topics:

We can solve trigonometric equations using the reference angles and trigonometric identities that have been learnt, as well as basic algebra.

We can solve trigonometric equations using the reference angles and trigonometric identities that have been learnt, as well as basic algebra.

We can solve trigonometric equations using the reference angles and trigonometric identities that have been learnt, as well as basic algebra.

We can use the sine, cosine and tangent graphs to solve trigonometric equations graphically.

# 9

# ✅

By sketching a graph, we can find that for cos2x = −cosx, in the interval 0º < x < 270º, x = 60°, 180°. Sketch this graph showing the intersection points of the curves.

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