# StudySquare

# Edexcel A-level Maths Trigonometric Identities

This page covers the following topics:

We can use both Pythagorean identities to solve algebra and geometry problems.

# 2

# ✅

Find the value of tanx, given that cosx = −0.7 and x is in the 2nd quadrant. Give your answer correct to two decimal places.

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