# Find the exact value of : tan(arccos 2/3) Solve : 2 sin^2 x+ sin x-1=o Verify the identity: (sec^2 x-1/sec^2)=sin^2

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## Question:

Find the exact value of : tan(arccos 2/3)

Solve : 2 sin^2 x+ sin x-1=o

Verify the identity: (sec^2 x-1/sec^2)=sin^2 x

Solve : cos x-1= -cos x [0,2pie)

**Related Book For**

## Discovering Advanced Algebra An Investigative Approach

ISBN: 978-1559539845

1st edition

Authors: Jerald Murdock, Ellen Kamischke, Eric Kamischke

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