SOLUTION: How do you solve cos (tan^-1 (7/6)) ?

Question 827502: How do you solve cos (tan^-1 (7/6)) ?
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
How do you solve cos (tan^-1 (7/6)) ?
let x=angle whose tangent=(7/6)
hypotenuse of working right triangle=√(7^2+6^2)=√(49+36)=√85
cos (tan^-1 (7/6))=cos(x)=6/√85=6√85/85
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