Given the integral:
∫ d x x 5 9 x 2 − 1
Identify the following in order to complete a trigonometric substitution:
From the radical expression, what is a? What is u?
What should the trig substitution be?
[That is, complete the appropriate substitution:
u = a ⋅ sin( θ ), a = a ⋅ tan( θ ), or u = a ⋅ sec( θ )]
Do NOT compute the integral. Just identify the appropriate substitution.
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