If x = 2 tan θ, use trigonometric substitution to write 
as a trigonometric function of θ, where 
.
A) 2 csc θ
B) 2 sec θ
C) 2 cos θ
D) 2 tan θ
E) 2 sin θ
Correct Answer:
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Q249: If x = 2 tan θ, use
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