Use the given information to find the exact function value. Simplify your answer as much as possible. Rationalize the denominator if necessary. cost =−2/5, t in Quadrant III         (a)sin2t =                 (b) cos2t =                             (c) tan2t =

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.5: Trigonometric Graphs
Problem 10E
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Use the given information to find the exact function value. Simplify your answer as much as possible. Rationalize the denominator if necessary.

cost =−2/5, t in Quadrant III
 
 
 

 

(a)sin2t =
 
 
 
 



 
 
 

 

(b)
cos2t =
 
 
 
 
 
 
 
 
 

 

 
 
 

 

(c)
tan2t =
 
 
 
 
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