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4-30.

Solve for the indicated value. Leave your answer in exact form.  

  1.  _______

    Use the Pythagorean Theorem.

  1. _______

    Use the Pythagorean Theorem to find the missing side. Is the triangle a special one?

    This is a triangle. Therefore,  is .

  1. ____

    The inverse tangent function will be helpful here.

  1. _______

    Use the cosine ratio or special right triangles.