posted by .

inverse tan x = inverse cos 4/5

  • trig -

    inverse cos 4/5
    = cos^-1 (4/5)
    = .6435..
    then tan^-1 x = .6435...
    x = tan .6435...
    = .75

    or, make a diagram with sides 3-4-5
    then, if tan^-1 x = cos^-1 (4/5)
    then x = tan (cos^-1(4/5) )
    = 3/4 or .75

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. evaluation

    Evaluate 1. sin(tan inverse sqrt(x^2-2x)) 2. tan (sec inverse 3y)
  2. Evaluation-repost

    Reposting because it has gone down to the second page! Evaluate 1. sin(tan inverse sqrt(x^2-2x)) 2. tan (sec inverse 3y) For 1. draw a right triangle and label the opposite leg sqrt(x^2-2x), the adjacent side 1 and the hypotenuse x-1. …
  3. trig

    How do you find the exact value of an inverse function geometrically. ie, tan(cos-1(4/5))
  4. Math

    Determine whether each equation is true for all x for which both sides of the equation are defined. If it is true, support your conclusion with a sketch using the unit circle. If it is false, give a counterexample. inverse sin(-x)=-inverse …
  5. trig

    use an inverse trig function to write è as a function of x (There is a right triangle. The hypotenuse is 2. è is the angle between the base and the hypotenuse. The base/adjacent side of è is (x + 1) The side opposite è does not …
  6. trig

    Tan(cos inverse 5x)
  7. Precalculus

    Find the exact value of: Cos(inverse tan 4/3 + inverse cos 5/13)
  8. Advanced Algebra

    What is the inverse of each of the functions defined by the following equations, if the inverse exists. If the inverse does not exist for the largest possible domain, limit the domain so that the inverse will exist. In each case, give …
  9. Math

    y=arccos(sin(x)), find dy/dx and sketch it's graph(I guess I can do this on wolframalpha after I'm done solving the question). And by arcsin I mean inverse of the expression(written like cos^-1(sin(x)), but is not 1/cos(sinx) but the …
  10. Trig

    Solve for t algebraically: inverse cos(t) = inverse sin(t). Where do I start?

More Similar Questions