If z = /2, show that cosa = 1-z 2 1+z
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If z = α/2, show that
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cosa = 1-z² 2 1+z²
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To show that cos 1 z21 z2 when z 2 we can use the double angle formula for cosine cos2 1 2sin2 Lets ...View the full answer
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Related Book For
Precalculus Concepts Through Functions A Unit Circle Approach To Trigonometry
ISBN: 9780137945139
5th Edition
Authors: Michael Sullivan
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