Use the Trigonometric Substitution U = a Tan θ,Where 0 $\sqrt { a ^ { 2 } + u ^ { 2 } }$

question 56

Multiple Choice

Use the trigonometric substitution u = a tan θ,where 0 < θ < π/2 and to simplify the expression $\sqrt { a ^ { 2 } + u ^ { 2 } }$ . ​

• A)​- a sec θ
• B)​a sec θ
• C)​a tan θ
• D)​a sin θ
• E)​a csc θ

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