CALCULUS Understanding Its Concepts and Methods
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The tangent of a number x is the sine divided by the
cosine. The triangle in the animation is similar to a triangle
with base 1.
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Copyright © 2006 Darel Hardy, Fred Richman, Carol Walker, Robert Wisner. All rights reserved. Except upon the express prior permission in writing, from the authors, no part of this work may be reproduced, transcribed, stored electronically, or transmitted in any form by any method.