Use the following information to determine cos(2x) cos(x)=1/5 and tan(x) is positive or  cos(x)=1 *over* 5 and tan(x) is positive

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter4: Calculating The Derivative
Section4.CR: Chapter 4 Review
Problem 2CR: Determine whether each of the following statements is true or false, and explain why. The derivative...
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Use the following information to determine cos(2x)

cos(x)=1/5 and tan(x) is positive

or 

cos(x)=1 *over* 5 and tan(x) is positive

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ISBN:
9780321964038
Author:
GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:
Pearson Addison Wesley,