SOLUTION: Write the following algebraic (non-trigonometric) expression in u, u>0. sec(cot^(-1)(sqrt(4-u^2)/u))

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Question 769295: Write the following algebraic (non-trigonometric) expression in u, u>0.
sec(cot^(-1)(sqrt(4-u^2)/u))

Answer by lwsshak3(11628)   (Show Source): You can put this solution on YOUR website!
Write the following algebraic (non-trigonometric) expression in u, u>0.
sec(cot^(-1)(sqrt(4-u^2)/u))
let x=angle of cot inverse
cotx=√((4-u^2)/u)
tanx=√(u/(4-u^2))=√(sec^2x-1)
u/(4-u^2)=sec^2x-1
sec^2x=(u/(4-u^2))+1
secx=√(u/(4-u^2)+1)
sec(cot^(-1)(sqrt(4-u^2)/u))=√(u/(4-u^2)+1)

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